code: public LinkChangeListener getLinkChangeListener() {
          if (TraceComponent.isAnyTracingEnabled()
              && tc.isEntryEnabled()) {
              SibTr.entry(tc, "getLinkChangeListener");
              SibTr.exit(tc, "getLinkChangeListener", _linkChangeListener);
          }
          return _linkChangeListener;
      }
docs: <p>
  Get the link change listener that is registered with TRM for changes to
  the WLM link groups
  </p>
  
  @return LinkChangeListener