/// <reference path="../../../third_party/typings/browser.d.ts" />
export declare class Counter {
    private destructor_;
    private counter_;
    private fulfillDestroyed_;
    private rejectDestroyed_;
    private onceDestroyed_;
    constructor(destructor_: () => void);
    wrap: <T>(f: () => Promise<T>) => Promise<T>;
    discard: () => void;
    onceDestroyed: () => Promise<void>;
    private before_;
    private after_;
}