docs: public void connectionClosed(Object connectionReference) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "connectionClosed", connectionReference);
  
          removeAllConversations(connectionReference);
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "connectionClosed");
      }