Looks like, using the VirtualQueryableCollectionView, it is possible to lazy load the data if it is flat, but it is not possible if the data is displayed hierarchically. That is, using VirtualQueryableCollectionView, if GroupBy is done for single\multiple columns, the grouping is done only of the initial few records, obviously, as only few records are loaded initially by the VirtualQueryableCollectionView.
If there are multiple groupings then there is a hierarchy, and one can drill down subgroups step by step. I wanted to know if there is a way with GridView to lazily load the subgroup items.
Any suggestions will be helpful.