public static boolean isClone(@Nullable PsiMethod method) {
    if (method == null) {
      return false;
    }
    final PsiClassType javaLangObject;
    if (!PsiUtil.isLanguageLevel5OrHigher(method)) {
      javaLangObject = TypeUtils.getObjectType(method);
    }
    else {
      // for 1.5 and after, clone may be covariant
      if (method.getReturnType() instanceof PsiPrimitiveType) {
        return false;
      }
      javaLangObject = null;
    }
    return MethodUtils.methodMatches(method, null, javaLangObject, HardcodedMethodConstants.CLONE, PsiType.EMPTY_ARRAY);
  }
public static boolean isClone(@Nullable PsiMethod method)