Represents group instances within a custom report item's data. This class cannot be inherited.
Assembly: Microsoft.ReportingServices.ProcessingCore (in Microsoft.ReportingServices.ProcessingCore.dll)
There is one data member for each group instance. For example, if sales data groups on product category and product along columns and country and region along rows, there will be one data member for each product category (that contains a data member for each product in that category) in the DataColumnGroupings and there will be one data member for each country (that contains a data member for each region in that country) in the DataRowGroupings.