code: public void addConnectionEventListener(
              final ConnectionEventListener listener) {
  
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled()) {
              SibTr.entry(this, TRACE, "addConnectionEventListener", listener);
          }
  
          _eventListeners.add(listener);
  
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled()) {
              SibTr.exit(this, TRACE, "addConnectionEventListener");
          }
  
      }
docs: Adds a connection event listener. Typically the connection manager will
  register itself using this mechanism.
  
  @param listener
  the listener to add