@Override
  public @Nullable UsageGroup getParentGroupFor(@NotNull Usage usage, UsageTarget @NotNull [] targets) {
    final FileUsageGroup usageGroup = (FileUsageGroup)super.getParentGroupFor(usage, targets);
    if (usageGroup != null) {
      final PsiFile psiFile = usageGroup.getPsiFile();
      if (psiFile instanceof PsiJavaFile && !(psiFile instanceof ServerPageFile)) {
        return null;
      }
    }
    return usageGroup;
  }
@Override
  public @Nullable UsageGroup getParentGroupFor(@NotNull Usage usage, UsageTarget @NotNull [] targets)