public static boolean isDGMMethod(@Nullable PsiElement element) {
    if (!(element instanceof PsiMethod)) return false;

    final PsiMethod method = element instanceof GrGdkMethod ? ((GrGdkMethod)element).getStaticMethod() : (PsiMethod)element;
    final PsiClass aClass = method.getContainingClass();
    if (aClass == null) return false;

    final String qname = aClass.getQualifiedName();
    return DEFAULT_INSTANCE_EXTENSIONS.contains(qname) || DEFAULT_STATIC_EXTENSIONS.contains(qname);
  }
public static boolean isDGMMethod(@Nullable PsiElement element)