off method

void off(
  1. String eventName,
  2. Function? fn
)

Implementation

void off(String eventName, Function? fn) {
  if (fn == null) {
    events[eventName] = [];
  } else if (events.containsKey(eventName)) {
    events[eventName] =
        events[eventName]!.where((callback) => callback != fn).toList();
    if (events[eventName]!.isEmpty) {
      events.remove(eventName);
    }
  }
}