removeAllListeners method
Removes all listeners, or those of the specified event. @param event The event for which to remove all listeners. @returns A reference to the AsyncEventEmitter, so that calls can be chained.
Implementation
AsyncEventEmitter removeAllListeners(String? event) {
if (event == null) {
// delete all listeners
_listeners = {};
} else {
_listeners.remove(event);
}
return this;
}