type Obj = {
    [key: string]: any;
};
export type QueryObj<T> = Partial<T> | {
    _id: string | {
        $in: string[];
    };
    _deleted?: Date | {
        $ne: "hack";
    };
};
export type UpsertFunction = <T extends Obj>(collection: string, query: QueryObj<T>, update: Partial<T>) => Promise<void>;
export type FindFunction = <T extends Obj>(collection: string, query: QueryObj<T>) => Promise<T[]>;
export type InsertFunction = <T extends Obj>(collection: string, insert: T) => Promise<T>;
export type DeleteFunction = (collection: string, _id: string) => Promise<void>;
export type SaveFunction = <T extends Obj>(collection: string, _id: string, update: Partial<T>) => Promise<void>;
export {};
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