UnityEditor.EditorUtility.IsPersistent C# (CSharp) Method

        public static extern bool IsPersistent(Object target);
        [MethodImpl(MethodImplOptions.InternalCall)]

        static bool CreatePrefabVariantValidation()
        {
            var go = Selection.activeGameObject;

            return(go != null && EditorUtility.IsPersistent(go));
        }