public static void OnGUI()
 {
     if (GUILayout.Button("Install"))
     {
         GGriffinBrpInstaller.Install();
     }
 }
        public static void OnGUI()
        {
#if UNITY_2019
            GUI.enabled = true;
#else
            GUI.enabled = false;
#endif
            if (GUILayout.Button("Install"))
            {
                GGriffinBrpInstaller.Install();
            }

            GUI.enabled = true;
        }