code: function _registerProxy(eventChannel) {
                  if (eventChannel && "function" === typeof eventChannel.registerProxy) {
                      eventChannel.registerProxy({
                          trigger: function () {
                              _postMessage.call(this, Array.prototype.slice.apply(arguments), ACTION_TYPE.TRIGGER);
                          },
                          context: this
                      });
                  }
              }
docs: Registers an external call to trigger for events to propagate calls to Channels.trigger automatically
  @param eventChannel
  @private