off method
Implementation
off(String event, callback) {
event = event.toLowerCase();
if (_events.containsKey(event)) {
if (callback != null)
_events[event]?.remove(callback);
else
this._events[event] = [];
}
}
off(String event, callback) {
event = event.toLowerCase();
if (_events.containsKey(event)) {
if (callback != null)
_events[event]?.remove(callback);
else
this._events[event] = [];
}
}