docs: protected void purgeClosedConnection(OutboundConnection connection)
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "purgeClosedConnection", connection);
          purge(connection, false, false);
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "purgeClosedConnection");
      }