import { Type, WrappedType } from "@simplysm/sd-core-common";
export declare class QueryUnit<T> {
    readonly type: Type<T | WrappedType<T>> | undefined;
    private readonly _query;
    constructor(type: Type<T | WrappedType<T>> | undefined, _query: any);
    get query(): any;
    notNull(): QueryUnit<NonNullable<T>>;
    nullable(): QueryUnit<T | undefined>;
}