<sc-grid-fields>
                <sc-grid-field  data-field="old" data-type="object"></sc-grid-field>
            </sc-grid-fields>
        </sc-grid>

.........

            onResponse : function(event)
            {
                var me = this;
                var _result = event.target.lastResponse;
                
                switch (event.target.id)
                {
                    case "selNP" :
                        me.$.gridPanelNPHD.setDataProvider([_result.npHD]);
                        
                        _result.npDT.forEach(function(data, index, array)
                        {
                            data.old = UT.copy(data);
                        });

                        me.set("npHD", _result.npHD);
                        me.set("npDT", _result.npDT);
                        
                        me.applyFormula();
                        break;


.........

            setColumnNPDT : function()
            {
                var me = this;
                var _gridNPDT       = me.$.gridPanelNPDT;
                var _providerNPDT   = _gridNPDT.getDataProvider();

                _providerNPDT.setItemAtBatch(true, function(_index, _data)
                {
                    return  { npd_prod_cd       : me.onItemEditable(_data, {dataField:"npd_prod_cd"})       ? _data.old.npd_prod_cd     : null
                            , npd_item_cd       : me.onItemEditable(_data, {dataField:"npd_item_cd"})       ? _data.old.npd_item_cd     : null
                            , npd_gds_nm_ko     : me.onItemEditable(_data, {dataField:"npd_gds_nm_ko"})     ? _data.old.npd_gds_nm_ko   : null
                            , npd_np_nm         : me.onItemEditable(_data, {dataField:"npd_np_nm"})         ? _data.old.npd_np_nm       : null
                            , npd_color_chip    : me.onItemEditable(_data, {dataField:"npd_color_chip"})    ? _data.old.npd_color_chip  : null
                            , npd_sal_vd_nm     : me.onItemEditable(_data, {dataField:"npd_sal_vd_nm"})     ? _data.old.npd_sal_vd_nm   : null
                            , npd_aft_open_mm   : me.onItemEditable(_data, {dataField:"npd_aft_open_mm"})   ? _data.old.npd_aft_open_mm : null
                            , npd_bar_cd        : me.onItemEditable(_data, {dataField:"npd_bar_cd"})        ? _data.old.npd_bar_cd      : null
                            , npd_orgn          : me.onItemEditable(_data, {dataField:"npd_orgn"})          ? _data.old.npd_orgn        : null
                            , npd_nfs_cd        : me.onItemEditable(_data, {dataField:"npd_nfs_cd"})        ? _data.old.npd_nfs_cd      : null
                            , npd_nfs_etc       : me.onItemEditable(_data, {dataField:"npd_nfs_etc"})       ? _data.old.npd_nfs_etc     : null
                            , npd_add_rem       : me.onItemEditable(_data, {dataField:"npd_add_rem"})       ? _data.old.npd_add_rem     : null
                            , npd_rqst_rem      : me.onItemEditable(_data, {dataField:"npd_rqst_rem"})      ? _data.old.npd_rqst_rem    : null
                            };
                });

                _gridNPDT.refresh();
            },

---------------------------------------------
sc-grpi-field에 object형으로 선언해줘야 한다.
setItemAtBatch로 return {old:UT.copy(_data)}로 만들어도 역시 선언이 필요하다.