code: function (orig, response) {
              if (!orig.id) {
                  console.log("[Brackets LiveDev] Trying to send a response for a message with no ID");
                  return;
              }
              response.id = orig.id;
              this.send(response);
          }
docs: Send a response of a particular message to the Editor.
  Original message must provide an 'id' property
  @param {Object} orig Original message.
  @param {Object} response Message to be sent as the response.