docs: def listen_on(self, trigger: str, **kwargs) -> callable:
          """
          This is a simple decorator for registering a callback for an event. You can also use 'register_listener'.
          A list with all possible options is available via LISTEN_ON_OPTIONS.
          :param trigger: Currently supported options: 'universe availability change', 'universe'
          """
          def decorator(f):
              self.register_listener(trigger, f, **kwargs)
              return f
          return decorator