code: def process_presence(self, stanza):
          
  
          stanza_type = stanza.stanza_type
          return self.__try_handlers(self._presence_handlers, stanza, stanza_type)
docs: Process presence stanza.
  
          Pass it to a handler of the stanza's type and payload namespace.
  
          :Parameters:
              - `stanza`: presence stanza to be handled