removeFromGroup method

@override void removeFromGroup(String groupName, String event)

Removes an event from group groupName.

Removes the specified event from the group. If the group becomes empty after removal, the entire group is removed from the system.

groupName - The name of the group to remove the event from event - The event name to remove from the group

Implementation

@override
void removeFromGroup(String groupName, String event) {
  _eventGroups[groupName]?.remove(event);
  if (_eventGroups[groupName]?.isEmpty ?? false) {
    _eventGroups.remove(groupName);
  }
}