private static boolean isFxmlUsage(PsiMember member, GlobalSearchScope scope) {
    final String name = member.getName();
    if (name == null) return false;
    final Project project = member.getProject();
    final PsiSearchHelper searchHelper = PsiSearchHelper.getInstance(project);
    final PsiSearchHelper.SearchCostResult searchCost = searchHelper.isCheapEnoughToSearch(name, scope, null);
    if (searchCost == PsiSearchHelper.SearchCostResult.FEW_OCCURRENCES) {
      final Query<PsiReference> query = ReferencesSearch.search(member, scope);
      return query.findFirst() != null;
    }
    return false;
  }
private static boolean isFxmlUsage(PsiMember member, GlobalSearchScope scope)