How to use

NO_WRAP_EVENTS

function

in

Array

listeners(eventName) {
    if(this._name == null && WebSocketChannel.NO_WRAP_EVENTS.indexOf(eventName) >= 0)
      return this._emitter.listeners(eventName);
    else {
      return this._emitter.listeners(eventName).map((wrapper) => {
        return wrapper._original;
      });
    }
  }

/* The following `emit` and `request` methods will serialize and send the
    event over the WebSocket using the WebSocketWrapper. */
  emit(eventName) {
    if(this._name == null && WebSocketChannel.NO_WRAP_EVENTS.indexOf(eventName) >= 0)
      return this._emitter.emit.apply(this._emitter, arguments);
    else
      return this._wrapper._sendEvent(this._name, eventName, arguments);
  }

removeListener(eventName, listener) {
    if(this._name == null && WebSocketChannel.NO_WRAP_EVENTS.indexOf(eventName) >= 0)
      this._emitter.removeListener(eventName, listener);
    else
      this._emitter.removeListener(eventName,
        this._wrappedListeners.get(listener) );
    return this;
  }

once(eventName, listener) {
    if(this._name == null && WebSocketChannel.NO_WRAP_EVENTS.indexOf(eventName) >= 0)
      this._emitter.once(eventName, listener, this);
    else
      this._emitter.once(eventName, this._wrapListener(listener) );
    return this;
  }

/* Expose EventEmitter-like API
    When `eventName` is one of the `NO_WRAP_EVENTS`, the event handlers
    are left untouched, and the emitted events are just sent to the
    EventEmitter; otherwise, event listeners are wrapped to process the
    incoming request and the emitted events are sent to the WebSocketWrapper
    to be serialized and sent over the WebSocket. */

  on(eventName, listener) {
    if(this._name == null && WebSocketChannel.NO_WRAP_EVENTS.indexOf(eventName) >= 0)
      /* Note: The following is equivalent to:
          `this._emitter.on(eventName, listener.bind(this));`
        But thanks to eventemitter3, the following is a touch faster. */
      this._emitter.on(eventName, listener, this);
    else
      this._emitter.on(eventName, this._wrapListener(listener) );
    return this;
  }