@Nullable
    private AnalysisScope getScope(Set<? extends PsiFile> selectedScope) {
      Set<PsiFile> result = new HashSet<>();
      ((PackageDependenciesNode)myLeftTree.getModel().getRoot()).fillFiles(result, !mySettings.UI_FLATTEN_PACKAGES);
      selectedScope.removeAll(result);
      if (selectedScope.isEmpty()) return null;
      List<VirtualFile> files = new ArrayList<>();
      final ProjectFileIndex fileIndex = ProjectRootManager.getInstance(myProject).getFileIndex();
      for (PsiFile psiFile : selectedScope) {
        final VirtualFile file = psiFile.getVirtualFile();
        LOG.assertTrue(file != null);
        if (fileIndex.isInContent(file)) {
          files.add(file);
        }
      }
      if (!files.isEmpty()) {
        return new AnalysisScope(myProject, files);
      }
      return null;
    }
@Nullable
    private AnalysisScope getScope(Set<? extends PsiFile> selectedScope)