@Override
  public void fillFiles(Set<? super PsiFile> set, boolean recursively) {
    super.fillFiles(set, recursively);
    int count = getChildCount();
    for (int i = 0; i < count; i++) {
      PackageDependenciesNode child = (PackageDependenciesNode)getChildAt(i);
      child.fillFiles(set, true);
    }
  }
@Override
  public void fillFiles(Set<? super PsiFile> set, boolean recursively)