import { AsyncItemType } from './../base';
import { AnyIterable } from 'augmentative-iterable';
import { FluentAsyncIterable, FluentIterable } from '../base';
export type UnwindResult<Arr extends Array<keyof V>, V, Type extends 'sync' | 'async'> = {
    unwinded: {
        [k in Arr[number]]: V[k] extends (Type extends 'sync' ? Iterable<any> : AnyIterable<any>) ? AsyncItemType<V[k]> : V[k];
    };
    value: V;
};
export interface UnwindFunction<T, Type extends 'sync' | 'async'> {
    /**
     * Unwinds the specified properties creating a new iterable with multiple items
     * for each combination of unwinded values for each original item
     * @param keys The keys to be unwinded
     * @returns The object chain
     */
    <A extends Array<keyof T>>(...keys: A): Type extends 'sync' ? FluentIterable<UnwindResult<A, T, Type>> : FluentAsyncIterable<UnwindResult<A, T, Type>>;
}