private static ExcludedEntriesConfigurable createExcludedConfigurable(@NotNull Project project) {
    ProjectFileIndex index = project.isDefault() ? null : ProjectRootManager.getInstance(project).getFileIndex();
    final FileChooserDescriptor descriptor = new FileChooserDescriptor(true, true, false, false, false, true) {
      @Override
      public boolean isFileVisible(VirtualFile file, boolean showHiddenFiles) {
        return super.isFileVisible(file, showHiddenFiles) && (index == null || !index.isExcluded(file));
      }
    };

    List<VirtualFile> allContentRoots = new ArrayList<>();
    for (final Module module: ModuleManager.getInstance(project).getModules()) {
      final VirtualFile[] moduleContentRoots = ModuleRootManager.getInstance(module).getContentRoots();
      Collections.addAll(allContentRoots, moduleContentRoots);
    }
    descriptor.setRoots(allContentRoots);
    return new ExcludedEntriesConfigurable(project, descriptor, ValidationConfiguration.getExcludedEntriesConfiguration(project));
  }
private static ExcludedEntriesConfigurable createExcludedConfigurable(@NotNull Project project)