@Override
  public void enqueueQualifiedNameOccurrencesProcessor(RefClass refClass, Runnable c) {
    if (myQNameUsagesRequests == null) myQNameUsagesRequests = new HashMap<>();
    enqueueRequestImpl(refClass, myQNameUsagesRequests, c);
  }
@Override
  public void enqueueQualifiedNameOccurrencesProcessor(RefClass refClass, Runnable c)