removeEventListener method
Remove an event listener @return The self object, for chainability.
Implementation
EventTarget removeEventListener(String type, Function listener){
if (_listeners == null) {
return this;
}
final listeners = _listeners;
if (listeners?[type] == null) {
return this;
}
final index = listeners?[type]?.indexOf(listener);
if (index != null && index != -1) {
listeners?[type]?.removeAt(index);
}
return this;
}