import { AsyncSequence } from "../../sequency";
import IndexedValue from "../../IndexedValue";
export declare class WithIndex {
    /**
     * Returns a new sequence consisting of indexed values for all original elements.
     *
     * @returns {AsyncSequence<IndexedValue<T>>}
     */
    withIndex<T>(this: AsyncSequence<T>): AsyncSequence<IndexedValue<T>>;
}