code: func (el *ChannelEventListener) RegInputSelection() *ChannelEventListener {
  	el.ExecutingInputSelection = make(chan bool)
  	el.ids = append(el.ids, el.em.RegisterListener(func(data interface{}) {
  		el.ExecutingInputSelection <- data.(bool)
  	}, event.EventDoingInputSelection))
  	return el
  }
docs: // RegInputSelection registers this listener to listen to when input selection is executed.