docs: int removeRef()
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(tc, "removeRef");
  
      int ret = NOP;
  
      // If this is the last reference, then the operation is unsubscribe.
  
      if (--_refCount == 0)
        ret = UNSUBSCRIBE;
  
      checkRefCount();
  
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(tc, "removeRef", String.valueOf(ret) +":"+ String.valueOf(_refCount));
  
      return ret;
    }