import { IEnumerable } from '../core/IEnumerable';
import { IParallelQueryable } from '../linq/IParallelQueryable';
import { IQueryable } from '../linq/IQuerable';
import { ICollection } from './ICollection';
import { IList } from './IList';
import { IStack } from './IStack';
export declare class Stack<T> implements IStack<T> {
    private arr;
    constructor(enumerable?: IEnumerable<T> | Iterable<T>);
    contains(item: T): boolean;
    get size(): number;
    clear(): boolean;
    push(item: T): boolean;
    push(...items: T[]): boolean;
    pop(): T;
    peek(): T;
    toArray(): T[];
    toCollection(): ICollection<T>;
    toList(): IList<T>;
    linq(): IQueryable<T>;
    plinq(): IParallelQueryable<T>;
    [Symbol.iterator](): Iterator<T>;
    clone(): IStack<T>;
    toSet(): Set<T>;
    isEmpty(): boolean;
}