export declare type Iterableish<T> = Iterable<T> | Iterator<T> | AsyncIterable<T> | AsyncIterator<T>;
export declare type AnyIterable<T> = Iterable<T> | AsyncIterable<T>;
export declare type FlatMapValue<B> = B | AnyIterable<B> | undefined | null | Promise<B | AnyIterable<B> | undefined | null>;