Fetch different data source value in a Display method in D365 FO

Hi All,
Some time we have to fetch more than 1 data source value of a form in a display method in D365 FO, but the problem is we can pass only 1 data source buffer in the display method, so to overcome this have a look to the below code, in the example I am fetching the InventDim table buffer from the inventDim dataSource of the form.

[ExtensionOf(tableStr(InventDimCombination))]

final public class InventDimCombinationTbl_Extension

{

    public static display InventQtyAvailPhysical displayAvailSupplyQty(InventDimCombination _this)

    {

        InventDim            inventDimFind;

        InventSum            inventSumLocal;

        InventDimParm   inventDimParmLocal;

       

        FormDataSource  inventDimCombination_ds = _this.datasource();

        FormDataSource  inventDim_ds   = inventDimCombination_ds.formRun().dataSource("InventDim");

        InventDim    inventDim  = inventDim_ds.cursor();

       

        inventDimFind.initFromInventDim(inventDim);

        EcoResProductDimGroupSetup::copyProductDimensionsForItem(_this.ItemId, _this.inventDim(), inventDimFind);

        inventDimParmLocal.ItemIdFlag             = NoYes::Yes;

        inventDimParmLocal.InventStatusFlag  = NoYes::Yes;

        inventDimParmLocal.setActiveSiteAndWarehouseDimensions();

        inventDimParmLocal.setActiveProductDim(EcoResProductDimGroupSetup::newItemId(_this.ItemId));

        inventSumLocal = InventSum::findSumQty(_this.ItemId, inventDimFind, inventDimParmLocal);

        return inventSumLocal.AvailPhysical;

    }

 }

In this way we can find any datasource value which is linked to a form in a display method