docs: def _cx_state_psutil(self, tags=None):
          """
          Collect metrics about connections state using psutil
          """
          metrics = defaultdict(int)
          tags = [] if tags is None else tags
          for conn in psutil.net_connections():
              protocol = self._parse_protocol_psutil(conn)
              status = self.tcp_states['psutil'].get(conn.status)
              metric = self.cx_state_gauge.get((protocol, status))
              if metric is None:
                  self.log.warning('Metric not found for: %s,%s', protocol, status)
              else:
                  metrics[metric] += 1
  
          for metric, value in iteritems(metrics):
              self.gauge(metric, value, tags=tags)