'Append an event to the channel\'s list of events that are ready for
dispatch to user and signal our connection that this channel is ready
for event dispatch
:param _ChannelPendingEvt evt: an event derived from _ChannelPendingEvt'

def _add_pending_event(self, evt):

    self._pending_events.append(evt)
    self.connection._request_channel_dispatch(self.channel_number)
