public GridReference(ScriptableGrid scriptable)
        {
            m_context     = null;
            m_contextType = ReferenceContextType.Scriptable;

            m_scriptable      = scriptable;
            m_contextProvider = null;
            m_intrinsicValue  = default;
        }
        public GridReference(IContext ctx, ScriptableGrid value)
        {
            m_context     = ctx;
            m_contextType = ReferenceContextType.Scriptable;

            m_scriptable      = value;
            m_contextProvider = null;
            m_intrinsicValue  = default;
        }