@Nullable
  private static List<GrMethod> findConstructorCandidates(PsiElement element) {
    final GrField field = PsiTreeUtil.getParentOfType(element, GrField.class);
    if (field == null) return null;
    PsiClass containingClass = field.getContainingClass();
    if (!(containingClass instanceof GrTypeDefinition)) return null;
    return findConstructorCandidates(field, (GrTypeDefinition)containingClass);
  }
@Nullable
  private static List<GrMethod> findConstructorCandidates(PsiElement element)