/**
 * Copyright 2014 IBM Corp. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import request = require('request');
/**
 * Check if the service/request have error and try to format them.
 * @param  {Function} cb the request callback
 * @private
 * @returns {request.RequestCallback}
 */
export declare function formatErrorIfExists(cb: Function): request.RequestCallback;
/**
 * Creates the request.
 * 1. Merge default options with user provided options
 * 2. Checks for missing parameters
 * 3. Encode path and query parameters
 * 4. Call the api
 * @private
 * @returns {ReadableStream|undefined}
 * @throws {Error}
 */
export declare function sendRequest(parameters: any, _callback: any): any;