import { Promised } from "./utils";
declare global {
    interface Generator<T = unknown, TReturn = any, TNext = unknown> {
        prepend<TItem>(item: TItem): Generator<TItem | T, TNext, TReturn>;
    }
    interface AsyncGenerator<T = unknown, TReturn = any, TNext = unknown> {
        prepend<TItem>(item: Promised<TItem>): AsyncGenerator<T | TItem, TNext, TReturn>;
    }
}