docs: public List<String> introspect() {
          List<String> rc = new LinkedList<String>();
          rc.add(dumpChannelSelectorCounts(this.readInboundCount, "Read Inbound"));
          rc.add(dumpChannelSelectorCounts(this.readOutboundCount, "Read Outbound"));
          rc.add(dumpChannelSelectorCounts(this.writeInboundCount, "Write Inbound"));
          rc.add(dumpChannelSelectorCounts(this.writeOutboundCount, "Write Outbound"));
          rc.add(dumpChannelSelectorCounts(this.connectCount, "Connect"));
          return rc;
      }