docs: public void removePort(TCPPort endPoint) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.entry(tc, "removePort: " + endPoint.getServerSocket());
          }
  
          synchronized (this) {
              NBAcceptChannelSelector accept = endPointToAccept.get(endPoint);
  
              if (accept != null) {
                  // PK44756 - prevent hang on System.exit by accept selector
                  if (3100 <= accept.numExceptions) {
                      if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
                          Tr.event(tc, "Ignoring removePort call on fatal selector/system.exit path");
                      }
                      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
                          Tr.exit(tc, "removePort");
                      }
                      return;
                  }
                  EndPointActionInfo work = new EndPointActionInfo(REMOVE_ENDPOINT, endPoint, workSync);
  
                  synchronized (workSync) {
                      if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
                          Tr.event(this, tc, "Passing remove to selector; " + endPoint.getServerSocket());
                      }
                      accept.addWork(work);
                      try {
                          workSync.wait();
                      } catch (InterruptedException x) {
                          // nothing to do
                      }
                  } // end-sync
  
                  if (accept == sharedAccept && accept.getUsageCount() <= 0) {
                      sharedAccept = null;
                  }
              } else {
                  IllegalArgumentException iae = new IllegalArgumentException("TCP Port to be removed is not registered.");
                  if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
                      Tr.event(tc, "Throwing IllegalArgumentException");
                  }
                  FFDCFilter.processException(iae, CLASS_NAME + ".removePort", "387", this);
                  throw iae;
              }
          } // end-sync-this
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.exit(tc, "removePort");
          }
      }