private @Nullable Collection<PsiFileSystemItem> getCustomizationContexts(PsiFile file) {
    if (myOptions != null) {
      Function<PsiFile, Collection<PsiFileSystemItem>> value = DEFAULT_PATH_EVALUATOR_OPTION.getValue(myOptions);
      if (value != null) {
        final Collection<PsiFileSystemItem> roots = value.fun(file);
        if (roots != null) {
          for (PsiFileSystemItem root : roots) {
            if (root == null) {
              LOG.error("Default path evaluator " + value + " produced a null root for " + file);
            }
          }
          return roots;
        }
      }
    }
    return null;
  }
private @Nullable Collection<PsiFileSystemItem> getCustomizationContexts(PsiFile file)