import { Message } from '../../src/source_sink_task';
/**
 * Calls `callback` once Mocha has loaded its environment.
 *
 * See https://github.com/mochajs/mocha/issues/764
 */
export declare function withMocha(callback: () => void): void;
export interface SourceMessage extends Message {
    x: number;
}
export interface SinkMessage extends Message {
    x: string;
}
export declare function asStub(obj: any): any;