export declare class Handler<T, R extends T> {
    key: string;
    handle: (obj: T, ...rest: any[]) => Promise<R>;
    static fromCback<T, R extends T>(key: string, cback: (obj: T, c: (err: Error, res: R) => void, ...otherParams: any[]) => void): Handler<T, R>;
    constructor(key: string, handle: (obj: T, ...rest: any[]) => Promise<R>);
}