code: function(url, headers, params, timeout, callback) {
              var message = {
                  method: "GET",
                  headers: headers,
                  timeout: timeout,
                  query: params
              };
  
              return this.request(url, message, callback);
          }
docs: Performs a GET request.
  
  @param {String} url The URL of the GET request.
  @param {Object} headers An object of headers for this request.
  @param {Object} params Parameters for this request.
  @param {Number} timeout A timeout period.
  @param {Function} callback The function to call when the request is complete: `(err, response)`.
  
  @method splunkjs.Http