export interface PromiseCallbacks<T, K = void> {
    resolve: (value: T) => void;
    reject: (reason?: any) => void;
    metadata?: K;
}
export declare class PromiseWithCallbacks<T> {
    promise: Promise<T>;
    resolve: (value: T) => void;
    reject: (reason?: any) => void;
    constructor(cb: (resolve: (value: T) => void, reject: (reason?: any) => void) => any);
}