How to get product variants in D365FO using X++

  public EcoResProductDisplayProductNumber getProductVariants(SalesLine _saleLine)

    {

        InventDimCombination            inventDimCombination  = InventDimCombination::findVariantId(_saleLine.RetailVariantId);

        InventDim                       inventDim;

        InventDistinctProductExpanded   inventDistinctProductExpanded;

        select inventDistinctProductExpanded

            where inventDistinctProductExpanded.ItemId == _saleLine.ItemId

            && inventDistinctProductExpanded.InventDimId == inventDimCombination.InventDimId;

        return inventDistinctProductExpanded.DisplayProductNumber;

    }