public static class EditorDefines
{
    public const int Step = 20;

    public static class Priority
    {
        public static class Navigation
        {
            public const int Load_Navigation_Mesh       = 0 + 1 * Step;
            public const int Create_Navigation_Target   = 0 + 2 * Step;
            public const int Load_All_Navigation_Target = 1 + 2 * Step;
            public const int Save_All_Navigation_Target = 2 + 2 * Step;
        }
    }
}
