public override void OnInspectorGUI()
    {
        DrawDefaultInspector();

        SaveGameManager script = (SaveGameManager)target;

        if (GUILayout.Button("Save file from inspector"))
        {
            script.SaveFileFromInspector();
        }

        if (GUILayout.Button("Load file from inspector"))
        {
            script.LoadFileFromInspector();
        }
    }