removeAll(listener){

    if(listener == '**'){
      let newListeners = this.listeners('newListener')
      let removeListeners = this.listeners('removeListener')
      this._events = {};
      this.listenerTree = {};
      this.removeAllListeners(listener)
      for (let i = 0; i < removeListeners.length; i++) {
        this.addListener('removeListener',removeListeners[i])
      }
      for (let i = 0; i < newListeners.length; i++) {
        this.addListener('newListener',newListeners[i])
      }
    }else{
      this.removeAllListeners(listener)
    }
  }