import { AsyncSequence } from "../../sequency";
export declare class LastOrNull {
    /**
     * Returns the last element of the sequence or the last element matching `predicate` if present, otherwise returns `null`.
     *
     * @param {(value: T) => Promise<boolean> | boolean} predicate
     * @returns {Promise<T | null>}
     */
    lastOrNull<T>(this: AsyncSequence<T>, predicate?: (value: T) => Promise<boolean> | boolean): Promise<T | null>;
    /**
     * Returns the last element of the sequence or the last element matching `predicate` if present, otherwise returns `null`.
     *
     * @param {(value: T) => Promise<boolean> | boolean} predicate
     * @returns {Promise<T | null>}
     */
    findLast<T>(this: AsyncSequence<T>, predicate?: (value: T) => Promise<boolean> | boolean): Promise<T | null>;
}