 requests. For more info see `expect()`.    *    * @param {string|RegExp} url HTTP url.    * @param {Object=} headers HTTP headers.    * @returns {requestHandler} Returns an object with `respond` method that control how a matched    *   request is handled.    */    /**    * @ngdoc method    * @name ngMock.$httpBackend#expectDELETE    * @methodOf ngMock.$httpBackend    * @description    * Creates a new request expectation for 