import { ICollection } from '../types';
import { ArrayEnumerable } from '../enumerables/ArrayEnumerable';
export declare class Stack<TSource> extends ArrayEnumerable<TSource> implements ICollection<TSource> {
    constructor();
    constructor(collection: Iterable<TSource>);
    get length(): number;
    clear(): void;
    copyTo(array: TSource[]): void;
    copyTo(array: TSource[], arrayIndex: number): void;
    peek(): TSource;
    pop(): TSource;
    push(item: TSource): void;
    tryPeek(): TSource | null;
    tryPop(): TSource | null;
}
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