code: def conns(self, value: Set[str]) -> None:
          
          if not self._conns == value:
              old = self._conns
              self._conns = value
              ins = value - old
              outs = old - value
              logger.display("{}'s connections changed from {} to {}".format(self, old, value))
              self._connsChanged(ins, outs)
docs: Updates the connection count of this node if not already done.