import type { TypesaurusUtils as Utils } from "./utils.js";
import type { TypesaurusQuery as Query } from "./query.js";
import type { TypesaurusUpdate as Update } from "./update.js";
import type { TypesaurusFirebase as Firebase } from "./firebase.js";
import type { TypesaurusTransaction as Transaction } from "./transaction.js";
import type { TypesaurusShared as Shared } from "./shared.js";
export declare namespace TypesaurusCore {
    export interface Function {
        <Schema extends PlainSchema, Opts extends Options>(getSchema: ($: SchemaHelpers) => Schema, options?: Opts): DB<Schema>;
    }
    /**
     * Define custom id passing the collection path string as the generic.
     */
    export type Id<Path extends string | symbol | Array<string | symbol>> = string & {
        [idBrand]: Path;
    };
    const idBrand: unique symbol;
    /**
     * The custom id constrain. Used to define collection id type.
     */
    export type CustomIdConstrain = Id<string> | string | false;
    export type ModelType = ModelObjectType | ModelVariableType;
    export type ModelVariableType = [ModelObjectType] | [ModelObjectType, ModelObjectType] | [ModelObjectType, ModelObjectType, ModelObjectType] | [ModelObjectType, ModelObjectType, ModelObjectType, ModelObjectType] | [
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType
    ] | [
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType
    ] | [
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType
    ] | [
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType
    ] | [
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType
    ] | [
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType,
        ModelObjectType
    ];
    export type ModelObjectType = object & {
        length?: never;
    };
    /**
     * Resolves document model from the document definition.
     */
    export type DocModel<Def extends DocDef> = Utils.NeverIfEmpty<DocModelShape<Def>>;
    /**
     * Resolves document model from the document definition. Unlike
     * {@link DocModel} this version resolves unknown if the model has no keys.
     */
    export type DocModelOrUnknown<Def extends DocDef> = Utils.UnknownIfEmpty<DocModelShape<Def>>;
    /**
     * Resolves the reduced model or the shared model shape otherwise.
     */
    export type DocModelShape<Def extends DocDef> = Def["Flags"]["Reduced"] extends true ? IntersectVariableModelType<Def["Model"]> : SharedVariableModelType<Def["WideModel"]>;
    export type IntersectVariableModelType<Model extends ModelType> = Model extends ModelObjectType ? Model : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType,
        infer J extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C, D, E, F, G, H, I, J> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C, D, E, F, G, H, I> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C, D, E, F, G, H> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C, D, E, F, G> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C, D, E, F> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C, D, E> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C, D> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType
    ] ? Utils.IntersectShape<A, B, C> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType
    ] ? Utils.IntersectShape<A, B> : Model extends [infer A extends ModelObjectType] ? A : never;
    export type SharedVariableModelType<Model extends ModelType> = Model extends ModelObjectType ? Model : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType,
        infer J extends ModelObjectType
    ] ? Utils.SharedShape10<A, B, C, D, E, F, G, H, I, J> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType
    ] ? Utils.SharedShape9<A, B, C, D, E, F, G, H, I> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType
    ] ? Utils.SharedShape8<A, B, C, D, E, F, G, H> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType
    ] ? Utils.SharedShape7<A, B, C, D, E, F, G> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType
    ] ? Utils.SharedShape6<A, B, C, D, E, F> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType
    ] ? Utils.SharedShape5<A, B, C, D, E> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType
    ] ? Utils.SharedShape4<A, B, C, D> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType
    ] ? Utils.SharedShape3<A, B, C> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType
    ] ? Utils.SharedShape2<A, B> : Model extends [infer A extends ModelObjectType] ? A : never;
    export type UnionVariableModelType<Model extends ModelType> = Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType,
        infer J extends ModelObjectType
    ] ? A | B | C | D | E | F | G | H | I | J : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType
    ] ? A | B | C | D | E | F | G | H | I : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType
    ] ? A | B | C | D | E | F | G | H : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType
    ] ? A | B | C | D | E | F | G : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType
    ] ? Utils.SharedShape6<A, B, C, D, E, F> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType
    ] ? A | B | C | D | E : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType
    ] ? A | B | C | D : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType
    ] ? A | B | C : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType
    ] ? A | B : Model extends [infer A extends ModelObjectType] ? A : Model extends ModelObjectType ? Model : never;
    /**
     * Concats models into single variable model type. Useful to define and export
     * variable models ouside of the centraliazed schema definition.
     */
    export type ConcatModel<ModelToConcatTo extends ModelType, ModelToConcat extends ModelType> = ModelToConcatTo extends ModelObjectType ? ModelToConcat extends ModelObjectType ? [ModelToConcatTo, ModelToConcat] : ModelToConcat extends ModelVariableType ? [ModelToConcatTo, ...ModelToConcat] : never : ModelToConcatTo extends ModelVariableType ? ModelToConcat extends ModelObjectType ? [...ModelToConcatTo, ModelToConcat] : ModelToConcat extends ModelVariableType ? [...ModelToConcatTo, ...ModelToConcat] : never : never;
    export interface DocDefFlags {
        /** Signifies if a variable model document got reduced to a single shape. */
        Reduced: boolean;
        /** Signifies if a document got narrowed to shared shape. */
        Shared: boolean;
    }
    export interface DocDef {
        Model: ModelType;
        /**
         * The collection name (path segment).
         */
        Name: string;
        Id: Id<string> | string;
        /**
         * If the collection has variable shape, it will contain models tuple,
         * otherwise it will be equal {@link Model}.
         */
        WideModel: ModelType;
        Flags: DocDefFlags;
    }
    export interface DocProps {
        readonly environment: RuntimeEnvironment;
        readonly source: DataSource;
        readonly dateStrategy: ServerDateStrategy;
        readonly pendingWrites: boolean;
    }
    /**
     * The type of a `DocumentChange` may be 'added', 'removed', or 'modified'.
     */
    export type DocChangeType = "added" | "removed" | "modified";
    /**
     * Doc change information. It contains the type of change, the doc after
     * the change, and the position change.
     */
    export interface DocChange<Def extends DocDef, Props extends DocProps> {
        /** The type of change. */
        readonly type: DocChangeType;
        /** The document affected by this change. */
        readonly doc: Doc<Def, Props>;
        /**
         * The index of the changed document in the result set immediately prior to
         * this `DocumentChange` (i.e. supposing that all prior `DocumentChange` objects
         * have been applied). Is -1 for 'added' events.
         */
        readonly oldIndex: number;
        /**
         * The index of the changed document in the result set immediately after
         * this `DocumentChange` (i.e. supposing that all prior `DocumentChange`
         * objects and the current `DocumentChange` object have been applied).
         * Is -1 for 'removed' events.
         */
        readonly newIndex: number;
    }
    /**
     * An options object that configures the snapshot contents of `all` and
     * `query`.
     */
    export interface SubscriptionListMeta<Def extends DocDef, Props extends DocProps> {
        /**
         * Returns an array of the documents changes since the last snapshot. If
         * this is the first snapshot, all documents will be in the list as added
         * changes.
         */
        changes: () => DocChange<Def, Props>[];
        /** The number of documents in the QuerySnapshot. */
        readonly size: number;
        /** True if there are no documents in the QuerySnapshot. */
        readonly empty: boolean;
    }
    export interface DocOptions<Props extends DocProps> {
        serverTimestamps?: Props["dateStrategy"];
    }
    export interface ReadOptions<Environment extends RuntimeEnvironment, Props extends DocProps & {
        environment: Environment;
    }> extends DocOptions<Props>, OperationOptions<Environment> {
    }
    export type NarrowDef<Def extends DocDef, ReduceToModel, Flags = Def["Flags"]> = {
        Model: ReduceToModel;
        Id: Def["Id"];
        WideModel: Def["WideModel"];
        Flags: Flags;
    };
    /**
     * The document type. It contains the reference in the DB and the model data.
     */
    export interface Doc<Def extends DocDef, Props extends DocProps> extends DocAPI<Def> {
        type: "doc";
        /** The doc's ref. */
        ref: Ref<Def>;
        data: DocData<Def, Props>;
        readonly props: Props;
        test<Props extends Partial<DocProps>>(props: Props): this is Doc<Def, DocProps & Props>;
        assert<Props extends Partial<DocProps>>(props: Props): asserts this is Doc<Def, DocProps & Props>;
        /**
         * The function narrows the type to shared doc type. Unlike regular doc,
         * shared doc lacks methods which type-safety depends on knowing the full
         * type of the model: `set`, `upset`, and `as`. The `ref` is also limited.
         *
         * When models don't match, it resolves `unknown`.
         */
        as: Shared.DocAs<Def, Props>;
    }
    export type ServerData<Model extends ModelObjectType> = Data<Model, "present">;
    export type AnyData<Model extends ModelObjectType> = Data<Model, ServerDateMissing>;
    /**
     * Doc data type. Defines the shape of the document data returned from the
     * database. It resolves server dates.
     */
    export type Data<Model extends ModelObjectType, DateMissing extends ServerDateMissing> = {
        [Key in keyof Model]: DataField<Model[Key], DateMissing>;
    };
    /**
     * Doc data field. Processes data field types and resolves server dates.
     */
    export type DataField<Type, DateMissing extends ServerDateMissing> = Type extends ServerDate ? DateMissing extends "missing" ? Date | null : Date : Type extends Date | Ref<any> | string | number | boolean | null | undefined ? Type : Type extends Array<infer ItemType> ? Array<DataField<ItemType, DateMissing>> : Type extends object ? Data<Type, DateMissing> : never;
    /**
     * The document reference type.
     */
    export interface Ref<Def extends DocDef> extends DocAPI<Def> {
        type: "ref";
        collection: Collection<Def>;
        id: Def["Id"];
        /**
         * The function narrows the type to shared ref type. Unlike regular ref,
         * shared ref lacks methods which type-safety depends on knowing the full
         * type of the model: `set`, `upset`, and `as`. The `collection` is also
         * limited.
         *
         * When models don't match, it resolves `unknown`.
         */
        as: Shared.RefAs<Def>;
    }
    export type ServerDateMissing = "missing" | "present";
    export type ServerDateStrategy = "estimate" | "previous" | "none";
    export type RuntimeEnvironment = "server" | "client";
    export type DataSource = "cache" | "database";
    export interface ServerDate extends Date {
        [serverDateBrand]: true;
    }
    const serverDateBrand: unique symbol;
    export type DocData<Def extends DocDef, Props extends DocProps> = Props["environment"] extends "server" ? ServerData<IntersectVariableModelType<Def["Model"]>> : Props["source"] extends "database" ? Data<IntersectVariableModelType<Def["Model"]>, "present"> : Props["dateStrategy"] extends "estimate" | "previous" ? Data<IntersectVariableModelType<Def["Model"]>, "present"> : Data<IntersectVariableModelType<Def["Model"]>, "missing">;
    /**
     * Write data helpers, whichs allow to set special values, such as server date,
     * increment, etc.
     */
    export interface WriteHelpers<_Model> {
        /**
         * Returns server date value that sets the field to the server date.
         */
        serverDate(): ValueServerDate;
        /**
         * Returns remove value that removes the field.
         */
        remove(): ValueRemove;
        /**
         * Returns increment value that increments the field by the given value.
         *
         * @param value - The number to increment by.
         */
        increment<NumberType extends number>(value: NumberType): ValueIncrement<NumberType>;
        /**
         * Returns array union value that unions the given values with the array.
         *
         * @param values - The values to union to the array.
         */
        arrayUnion<Type>(values: Type | Type[]): ValueArrayUnion<Type>;
        /**
         * Returns array remove value that removes the given values from the array.
         *
         * @param values - The values to remove from the array.
         */
        arrayRemove<Type>(values: Type | Type[]): ValueArrayRemove<Type>;
    }
    /**
     * Assign argument. It resolves to assign data or getter function that returns
     * the assign data. It's used in add, set and upset functions.
     */
    export type AssignArg<Model extends ModelObjectType, Props extends DocProps> = WriteData<Model, Props> | AssignGetter<Model, Props>;
    /**
     * Assign data getter, accepts helper functions and returns the assign data.
     */
    export type AssignGetter<Model extends ModelObjectType, Props extends DocProps> = ($: WriteHelpers<Model>) => WriteData<Model, Props>;
    /**
     * Type of the data passed to assign functions (add, set and upset).
     * It extends the model allowing to set special values, such as server date,
     * increment, etc.
     */
    export type WriteData<Model extends ModelObjectType, Props extends DocProps> = {
        [Key in keyof Model]: WriteField<Model, Key, Model[Key], Props>;
    };
    /**
     * Write data field. Processes write data field types and adds corresponding
     * write helpers such as server data, increment, etc. Used in assign
     * functions (add, set and upset) and update functions.
     */
    export type WriteField<Parent, Key extends keyof Parent, Type, Props extends DocProps> = Type extends number ? WriteFieldNumber<Parent, Key, Type> : Type extends ServerDate ? WriteFieldServerDate<Parent, Key, Props> : Type extends undefined ? WriteFieldUndefined<Parent, Key> : Type extends Date | Ref<any> | string | boolean | null ? WriteFieldAsIs<Parent, Key> : Type extends Array<infer ItemType> ? WriteFieldArray<Parent, Key, ItemType> : Type extends object ? WriteFieldObject<Parent, Key, Type, Props> : never;
    /**
     * Write field object. Resolves object union with special value types.
     */
    export type WriteFieldObject<Parent, Key extends keyof Parent, Type extends ModelObjectType, Props extends DocProps> = WriteData<Type, Props> | MaybeValueRemove<Parent, Key>;
    /**
     * Number write field. Resolves number union with special value types.
     */
    export type WriteFieldNumber<Parent, Key extends keyof Parent, Type extends number> = Parent[Key] | ValueIncrement<Type> | MaybeValueRemove<Parent, Key>;
    /**
     * Server data write field. Resolves server date union with special value
     * types. When used in the server environment, it resolves to date as well.
     */
    export type WriteFieldServerDate<Parent, Key extends keyof Parent, Props extends DocProps> = Props["environment"] extends "server" ? Date | ValueServerDate | MaybeValueRemove<Parent, Key> : ValueServerDate | MaybeValueRemove<Parent, Key>;
    /**
     * Undefined write field. Resolves undefined union with special value types.
     */
    export type WriteFieldUndefined<Parent, Key extends keyof Parent> = (Utils.ActuallyUndefined<Parent, Key> extends true ? undefined | null : never) | MaybeValueRemove<Parent, Key>;
    /**
     * As-is write field. Resolves as-is types union with special value types.
     */
    export type WriteFieldAsIs<Parent, Key extends keyof Parent> = Exclude<Parent[Key], undefined> | MaybeValueRemove<Parent, Key>;
    /**
     * Array write field. Resolves array union with special value types.
     */
    export type WriteFieldArray<Parent, Key extends keyof Parent, ItemType> = Array<WriteArrayItem<ItemType>> | ValueArrayUnion<WriteArrayItem<ItemType>> | ValueArrayRemove<WriteArrayItem<ItemType>> | MaybeValueRemove<Parent, Key>;
    /**
     * Array write item type. Unlike {@link WriteField} it disallows arrays,
     * server dates and other special value types.
     */
    export type WriteArrayItem<Type> = Type extends ServerDate | Array<any> ? never : Type extends Date | Ref<any> | string | number | boolean | null | undefined ? Type : Type extends object ? WriteArrayItemObject<Type> : never;
    /**
     * Array write item object type. It's an array-nested object and behaves
     * differently than {@link WriteData}.
     */
    export type WriteArrayItemObject<Data extends ModelObjectType> = {
        [Key in keyof Data]: WriteArrayObjectField<Data[Key]>;
    };
    /**
     * It differs from {@link WriteArrayItem} as it allows arrays.
     */
    export type WriteArrayObjectField<Type> = Type extends Array<infer Item> ? Array<WriteArrayItem<Item>> : WriteArrayItem<Type>;
    /**
     * Resolves the remove type value unless the key is required.
     */
    export type MaybeValueRemove<Parent, Key extends keyof Parent> = Utils.RequiredKey<Parent, Key> extends true ? never : ValueRemove;
    /**
     * Available value kinds.
     */
    export type ValueKind = "remove" | "increment" | "arrayUnion" | "arrayRemove" | "serverDate";
    /**
     * The remove value type.
     */
    export interface ValueRemove {
        type: "value";
        kind: "remove";
    }
    /**
     * The increment value type. It holds the increment value.
     */
    export interface ValueIncrement<NumberType extends number> {
        type: "value";
        kind: "increment";
        number: NumberType;
    }
    /**
     * The array union value type. It holds the payload to union.
     */
    export interface ValueArrayUnion<Type> {
        type: "value";
        kind: "arrayUnion";
        values: Type[];
    }
    /**
     * The array remove value type. It holds the data to remove from the target array.
     */
    export interface ValueArrayRemove<Type> {
        type: "value";
        kind: "arrayRemove";
        values: Type[];
    }
    /**
     * The server date value type.
     */
    export interface ValueServerDate {
        type: "value";
        kind: "serverDate";
    }
    export interface SchemaHelpers {
        collection<Model extends ModelType, CustomId extends CustomIdConstrain = false>(): PlainCollection<Model, CustomId>;
    }
    export interface OperationOptions<Environment extends RuntimeEnvironment> {
        as?: Environment;
    }
    export type SubscriptionErrorCallback = (error: unknown) => any;
    export type OffSubscription = () => void;
    export interface OffSubscriptionWithCatch {
        (): void;
        catch(callback: SubscriptionErrorCallback): OffSubscription;
    }
    export interface SubscriptionPromise<Request, Result, SubscriptionMeta = undefined> extends Promise<Result> {
        request: Request;
        on: SubscriptionPromiseOn<Request, Result, SubscriptionMeta>;
    }
    export interface SubscriptionPromiseOn<Request, Result, SubscriptionMeta = undefined> {
        (callback: SubscriptionPromiseCallback<Result, SubscriptionMeta>): OffSubscriptionWithCatch;
        request: Request;
    }
    export type SubscriptionPromiseCallback<Result, SubscriptionMeta = undefined> = SubscriptionMeta extends undefined ? (result: Result) => void : (result: Result, meta: SubscriptionMeta) => void;
    export interface Request<Kind> {
        type: "request";
        kind: Kind;
        path: string;
        group?: boolean;
    }
    export interface GetRequest extends Request<"get"> {
        id: string;
    }
    export interface AllRequest extends Request<"all"> {
    }
    export interface ManyRequest extends Request<"many"> {
        ids: string;
    }
    export interface QueryRequest extends Request<"many"> {
        queries: Query.Query<any>[];
    }
    export interface DocAPI<Def extends DocDef> {
        get<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(options?: ReadOptions<Environment, Props>): SubscriptionPromise<GetRequest, Doc<Def, Props> | null>;
        set<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(data: AssignArg<UnionVariableModelType<Def["WideModel"]>, Props>, options?: OperationOptions<Environment>): Promise<Ref<Def>>;
        upset<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(data: AssignArg<UnionVariableModelType<Def["WideModel"]>, Props>, options?: OperationOptions<Environment>): Promise<Ref<Def>>;
        update: Update.DocFunction<Def>;
        remove(): Promise<Ref<Def>>;
        narrow<NarrowToModel extends ModelType>(fn: DocNarrowFunction<IntersectVariableModelType<Def["WideModel"]>, NarrowToModel>): Doc<{
            Model: NarrowToModel;
            Name: Def["Name"];
            Id: Def["Id"];
            WideModel: Def["WideModel"];
            Flags: Def["Flags"] & {
                Reduced: true;
            };
        }, DocProps> | undefined;
    }
    export type DocNarrowFunction<InputModel extends ModelType, ExpectedModel extends ModelType> = (data: InputModel) => false | Nullify<ExpectedModel>;
    export interface CollectionAPI<Def extends DocDef> {
        all<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(options?: ReadOptions<Environment, Props>): SubscriptionPromise<AllRequest, Doc<Def, Props>[], SubscriptionListMeta<Def, Props>>;
        query: Query.Function<Def>;
        count(): Promise<number>;
        sum(field: Utils.KeysOfType<DocModel<Def>, number>): Promise<number>;
        average(field: Utils.KeysOfType<DocModel<Def>, number>): Promise<number>;
    }
    /**
     *
     */
    export interface Collection<Def extends DocDef> extends CollectionAPI<Def> {
        /** The collection type */
        type: "collection";
        /** The collection path */
        path: string;
        /** The collection name */
        name: string;
        get<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(id: Def["Id"], options?: ReadOptions<Environment, Props>): SubscriptionPromise<GetRequest, Doc<Def, Props> | null>;
        many<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(ids: Def["Id"][], options?: ReadOptions<Environment, Props>): SubscriptionPromise<ManyRequest, Array<Doc<Def, Props> | null>>;
        add<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(data: AssignArg<UnionVariableModelType<Def["Model"]>, Props>, options?: OperationOptions<Environment>): Promise<Ref<Def>>;
        set<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(id: Def["Id"], data: AssignArg<UnionVariableModelType<Def["WideModel"]>, Props>, options?: OperationOptions<Environment>): Promise<Ref<Def>>;
        upset<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(id: Def["Id"], data: AssignArg<UnionVariableModelType<Def["WideModel"]>, Props>, options?: OperationOptions<Environment>): Promise<Ref<Def>>;
        update: Update.CollectionFunction<Def>;
        remove(id: Def["Id"]): Promise<Ref<Def>>;
        ref(id: Def["Id"]): Ref<Def>;
        doc<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(snapshot: Firebase.Snapshot): Doc<Def, Props> | null;
        doc<Environment extends RuntimeEnvironment, Props extends DocProps & {
            environment: Environment;
        }>(id: Def["Id"], data: DocData<Def, Props>, options?: OperationOptions<Environment>): Doc<Def, Props>;
        /**
         * Cast a string to typed document id.
         *
         * [Learn more on the docs website](https://typesaurus.com/docs/api/id).
         *
         * @param id - the string to cast to the typed document id
         * @returns typed document id
         *
         * @example
         * const commentId = db.comments.id('t2nNOgoQY8a5vcvWl1yAz26Ue7k2')
         */
        id(id: string): Def["Id"];
        /**
         * Generate random document id using Firebase.
         *
         * [Learn more on the docs website](https://typesaurus.com/docs/api/id).
         *
         * @returns promise to random typed document id
         *
         * @example
         * const newCommentId = await db.comments.id()
         */
        id(): Promise<Def["Id"]>;
        /**
         * The function narrows the type to shared collection type. Unlike regular
         * collection, shared collection lacks methods which type-safety depends on
         * knowing the full type of the model: `set`, `upset`, and `as`. The `ref`
         * is also limited.
         *
         * When models don't match, it resolves `unknown`.
         */
        as: Shared.CollectionAs<Def>;
    }
    export interface CollectionConfig {
        path?: string;
    }
    export interface NestedCollection<Def extends DocDef, Schema extends AnyDB> extends Collection<Def> {
        (id: Def["Id"]): Schema;
        schema: Schema;
        sub: NestedCollectionShortcuts<Schema>;
    }
    export type NestedCollectionShortcuts<Schema extends AnyDB> = {
        [Path in keyof Schema]: Path extends string ? Schema[Path] extends NestedCollection<infer Def, infer Schema> ? NestedCollectionShortcut<Def, Schema> : Schema[Path] extends Collection<infer Def> ? CollectionShortcut<Def> : Schema[Path] : never;
    };
    export interface CollectionShortcut<Def extends DocDef> {
        /**
         * Cast a string to typed document id.
         *
         * [Learn more on the docs website](https://typesaurus.com/docs/api/id).
         *
         * @param id - the string to cast to the typed document id
         * @returns typed document id
         *
         * @example
         * const commentId = db.posts.sub.comments.id('t2nNOgoQY8a5vcvWl1yAz26Ue7k2')
         */
        id(id: string): Def["Id"];
        /**
         * Generate random document id using Firebase.
         *
         * [Learn more on the docs website](https://typesaurus.com/docs/api/id).
         *
         * @returns promise to random typed document id
         *
         * @example
         * const newCommentId = await db.posts.sub.comments.id()
         */
        id(): Promise<Def["Id"]>;
    }
    export interface NestedCollectionShortcut<Def extends DocDef, Schema extends AnyDB> extends CollectionShortcut<Def> {
        sub: NestedCollectionShortcuts<Schema>;
    }
    export type AnyCollection<Def extends DocDef> = Collection<Def> | NestedCollection<Def, AnyDB>;
    export interface PlainCollection<Model extends ModelType, CustomId extends CustomIdConstrain = false, CustomName extends string | false = false> {
        /** The collection type */
        type: "collection";
        sub<Schema extends PlainSchema>(schema: Schema): NestedPlainCollection<Model, Schema, CustomId, CustomName>;
        name<Name extends string>(name: Name): PlainCollection<Model, CustomId, Name>;
    }
    export interface NestedPlainCollection<_Model extends ModelType, Schema extends PlainSchema, _CustomId extends CustomIdConstrain = false, _CustomName extends string | false = false> {
        /** The collection type */
        type: "collection";
        schema: Schema;
    }
    export type AnyPlainCollection = PlainCollection<any> | NestedPlainCollection<any, PlainSchema>;
    export interface PlainSchema {
        [Path: string | symbol]: PlainCollection<any> | NestedPlainCollection<any, PlainSchema>;
    }
    export interface AnyDB {
        [CollectionPath: string]: AnyCollection<any>;
    }
    export type DB<Schema, BasePath extends string | false = false> = {
        [Name in keyof Schema]: Name extends string ? Schema[Name] extends NestedPlainCollection<infer Model, infer Schema, infer CustomId, infer CustomName> ? NestedCollection<CollectionDef<Name, Model, CustomId, CustomName, BasePath>, DB<Schema, Utils.ComposePath<BasePath, Name>>> : Schema[Name] extends PlainCollection<infer Model, infer CustomId, infer CustomName> ? Collection<CollectionDef<Name, Model, CustomId, CustomName, BasePath>> : never : never;
    };
    /**
     * Resolves collection def.
     */
    export type CollectionDef<Name extends string, Model extends ModelType, CustomId, CustomName, BasePath extends string | false> = {
        Model: NullifyModel<Model>;
        Name: CustomName extends string ? CustomName : Name;
        Id: CustomId extends Id<any> | string ? CustomId : Id<Utils.ComposePath<BasePath, Name>>;
        WideModel: NullifyModel<Model>;
        Flags: DocDefFlags;
    };
    /**
     * Infers schema types. Useful to define function arguments that accept
     * collection doc, ref, id or data.
     */
    export type InferSchema<DB extends TypesaurusCore.DB<any, any>> = {
        [Path in keyof DB]: DB[Path] extends Collection<infer Def> | NestedCollection<infer Def, any> ? {
            /**
             * The type allows to access subcollections.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#subcollections)
             */
            sub: DB[Path] extends NestedCollection<any, infer Schema extends TypesaurusCore.DB<any, any>> ? InferSchema<Schema> : never;
            /**
             * The type represents the document id.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#id)
             */
            Id: Def["Id"];
            /**
             * The type represents the collection Collection instance.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#collection)
             */
            Collection: DB[Path];
            /**
             * The type represents the document Ref instance.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#ref)
             */
            Ref: TypesaurusCore.Ref<Def>;
            /**
             * The type represents the document Doc instance.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#doc)
             */
            Doc: TypesaurusCore.Doc<Def, DocProps>;
            /**
             * The type represents the document data. It’s what you get reading or
             * creating a document via collection’s doc.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#data)
             */
            Data: Data<IntersectVariableModelType<Def["Model"]>, ServerDateMissing>;
            /**
             * The type represents the result of a reading operation, like the get
             * method. It can be the Doc instance, null if the document is not
             * found, or undefined if the operation is still in progress.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#result)
             */
            Result: Doc<Def, DocProps> | null | undefined;
            /**
             * The type represents the argument of an assign function. It can be
             * used for all writing operations and expects the complete document
             * data.
             *
             * It unions AssignData and AssignGetter types.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#assignarg)
             */
            AssignArg: AssignArg<IntersectVariableModelType<Def["Model"]>, DocProps>;
            /**
             * The type represents the data of an assign function. It can be used
             * for all writing operations and expects the complete document data.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#assigndata)
             */
            AssignData: WriteData<IntersectVariableModelType<Def["Model"]>, DocProps>;
            /**
             * The type represents the getter of an assign function. It can be
             * used for all writing operations and expects the complete document
             * data.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#assigngetter)
             */
            AssignGetter: AssignGetter<IntersectVariableModelType<Def["Model"]>, DocProps>;
            /**
             * The type represents the write helpers of an assign function. It can
             * be used for all writing operations.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#writehelpers)
             */
            WriteHelpers: WriteHelpers<Def["Model"]>;
            /**
             * The type represents the update builder object.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#updatebuilder)
             */
            UpdateBuilder: Update.Builder<Def, DocProps>;
            /**
             * The type represents the argument of an update function.
             *
             * It unions UpdateData and UpdateGetter types.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#updatearg)
             */
            UpdateArg: Update.Arg<Def, DocProps>;
            /**
             * The type represents the data of an update function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#updatedata)
             */
            UpdateData: Update.Data<IntersectVariableModelType<Def["Model"]>, DocProps>;
            /**
             * The type represents the getter of an update function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#updategetter)
             */
            UpdateGetter: Update.ArgGetter<Def, DocProps>;
            /**
             * The type represents the update helpers of an update function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#updatehelpers)
             */
            UpdateHelpers: Update.Helpers<Def, DocProps>;
            /**
             * The type represents the query builder object.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#querybuilder)
             */
            QueryBuilder: Query.Builder<Def, DocProps>;
            /**
             * The type represents what the query method expects you to return
             * from the query function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#querydata).
             */
            QueryData: Query.Data<Def>;
            /**
             * The type represents the query function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#querygetter)
             */
            QueryGetter: Query.Getter<Def>;
            /**
             * The type represents the query helpers of a query function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#queryhelpers)
             */
            QueryHelpers: Query.Helpers<Def>;
            /**
             * The type is a server version of the Doc type where server dates are
             * always present, unlike the client version where they might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverdoc)
             */
            ServerDoc: TypesaurusCore.Doc<Def, DocProps & {
                environment: "server";
            }>;
            /**
             * The type is a server version of the Data type where server dates
             * are always present, unlike the client version where they might be
             * null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverdata)
             */
            ServerData: ServerData<IntersectVariableModelType<Def["Model"]>>;
            /**
             * The type is a server version of the Result type where server dates
             * are always present, unlike the client version where they might be
             * null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverresult)
             */
            ServerResult: Doc<Def, DocProps> | null | undefined;
            /**
             * The type is a server version of the AssignArg type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverassignarg)
             */
            ServerAssignArg: AssignArg<IntersectVariableModelType<Def["Model"]>, DocProps>;
            /**
             * The type is a server version of the AssignData type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverassigndata)
             */
            ServerAssignData: WriteData<IntersectVariableModelType<Def["Model"]>, DocProps & {
                environment: "server";
            }>;
            /**
             * The type is a server version of the AssignGetter type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverassigngetter)
             */
            ServerAssignGetter: AssignGetter<IntersectVariableModelType<Def["Model"]>, DocProps & {
                environment: "server";
            }>;
            /**
             * The type is a server version of the UpdateBuilder type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverupdatebuilder)
             */
            ServerUpdateBuilder: Update.Builder<Def, DocProps & {
                environment: "server";
            }>;
            /**
             * The type is a server version of the UpdateArg type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverupdatearg)
             */
            ServerUpdateArg: Update.Arg<Def, DocProps & {
                environment: "server";
            }>;
            /**
             * The type is a server version of the UpdateData type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverupdatedata)
             */
            ServerUpdateData: Update.Data<Def, DocProps & {
                environment: "server";
            }>;
            /**
             * The type is a server version of the UpdateGetter type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverupdategetter)
             */
            ServerUpdateGetter: Update.ArgGetter<Def, DocProps & {
                environment: "server";
            }>;
            /**
             * The type is a server version of the UpdateHelpers type where server
             * dates are always present, unlike the client version where they
             * might be null.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#serverupdatehelpers)
             */
            ServerUpdateHelpers: Update.Helpers<Def, DocProps & {
                environment: "server";
            }>;
            /**
             * The type represents transaction read document. What you return from
             * the transaction read function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#transactionreaddoc)
             */
            TransactionReadDoc: Transaction.ReadDoc<Def, DocProps>;
            /**
             * The type represents transaction write document. What you get in
             * the transaction write function.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#transactionwritedoc)
             */
            TransactionWriteDoc: Transaction.WriteDoc<Def, DocProps>;
            /**
             * The type represents the document definition. It’s in many methods
             * as a generic parameter.
             *
             * [Learn more on the docs website](https://typesaurus.com/types/schema/#def)
             */
            Def: Def;
        } : never;
    };
    /**
     * Narrow doc type. If your doc has multiple shapes, the type will help you
     * narrow down data type to a specific type.
     */
    export type NarrowDoc<OriginalDoc extends Doc<any, any>, NarrowToModel extends ModelObjectType> = OriginalDoc extends Doc<infer Def extends DocDef, infer Props extends DocProps> ? NarrowToModel extends IntersectVariableModelType<Def["WideModel"]> ? Doc<{
        Model: NarrowToModel;
        Name: Def["Name"];
        Id: Def["Id"];
        WideModel: Def["WideModel"];
        Flags: Def["Flags"] & {
            Reduced: true;
        };
    }, Props> : never : never;
    /**
     * Deeply normalizes server dates in a given type. It replaces ServerDate with
     * regular Date. It's useful when reusing interfaces in a non-Typesaurus
     * environment or when you need to store it in an array (where server dates
     * are not allowed).
     */
    export type NormalizeServerDates<Type> = Type extends ServerDate ? Date : Type extends Date | Ref<any> | string | number | boolean ? Type : Type extends Array<infer Item> ? Array<NormalizeServerDates<Item>> : Type extends object ? {
        [Key in keyof Type]: NormalizeServerDates<Type[Key]>;
    } : never;
    /**
     * The options. It allows to configure the Firebase settings.
     */
    export interface Options {
        /** The app name. */
        app?: string;
        /** The server options. */
        server?: OptionsServer;
    }
    /**
     * The server options.
     */
    export interface OptionsServer {
        /** The server app name. It takes priority over the root's app name. */
        app?: string;
        /** The option forces Firestore the use of REST transport until an operation
         * requires gRPC. It helps to speed up the cold start of the Functions. */
        preferRest?: boolean;
    }
    /**
     * The client options.
     */
    export interface OptionsServer {
        /** The client app name. It takes priority over the root's app name. */
        app?: string;
    }
    /**
     * Deeply adds null to all undefined values.
     */
    export type Nullify<Type> = Type extends null | undefined ? Type | null : Type extends ServerDate | Date | Ref<any> | string | number | boolean ? Type : Type extends Array<infer Item> ? Array<Nullify<Item>> : Type extends object ? {
        [Key in keyof Type]: Utils.ActuallyUndefined<Type, Key> extends true ? Nullify<Type[Key]> : Nullify<Exclude<Type[Key], undefined>>;
    } : never;
    /**
     * Deeply adds null to shapes of a variable model.
     */
    export type NullifyModel<Model extends ModelType> = Model extends ModelObjectType ? Nullify<Model> : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType,
        infer J extends ModelObjectType
    ] ? [
        Nullify<A>,
        Nullify<B>,
        Nullify<C>,
        Nullify<D>,
        Nullify<E>,
        Nullify<F>,
        Nullify<G>,
        Nullify<H>,
        Nullify<I>,
        Nullify<J>
    ] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType,
        infer I extends ModelObjectType
    ] ? [
        Nullify<A>,
        Nullify<B>,
        Nullify<C>,
        Nullify<D>,
        Nullify<E>,
        Nullify<F>,
        Nullify<G>,
        Nullify<H>,
        Nullify<I>
    ] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType,
        infer H extends ModelObjectType
    ] ? [
        Nullify<A>,
        Nullify<B>,
        Nullify<C>,
        Nullify<D>,
        Nullify<E>,
        Nullify<F>,
        Nullify<G>,
        Nullify<H>
    ] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType,
        infer G extends ModelObjectType
    ] ? [
        Nullify<A>,
        Nullify<B>,
        Nullify<C>,
        Nullify<D>,
        Nullify<E>,
        Nullify<F>,
        Nullify<G>
    ] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType,
        infer F extends ModelObjectType
    ] ? [
        Nullify<A>,
        Nullify<B>,
        Nullify<C>,
        Nullify<D>,
        Nullify<E>,
        Nullify<F>
    ] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType,
        infer E extends ModelObjectType
    ] ? [Nullify<A>, Nullify<B>, Nullify<C>, Nullify<D>, Nullify<E>] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType,
        infer D extends ModelObjectType
    ] ? [Nullify<A>, Nullify<B>, Nullify<C>, Nullify<D>] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType,
        infer C extends ModelObjectType
    ] ? [Nullify<A>, Nullify<B>, Nullify<C>] : Model extends [
        infer A extends ModelObjectType,
        infer B extends ModelObjectType
    ] ? [Nullify<A>, Nullify<B>] : Model extends [infer A extends ModelObjectType] ? [Nullify<A>] : never;
    export {};
}