The GroupingManager serves as the top-level of a tree of GroupingItem lists. The GroupingManager Refresh method fetches a list of GroupingItem objects according to Group criteria. Each GroupingItem object can contain a list of sub-groups.
Get a reference to a GroupingManager object from the GroupingManager Property of the IBaseFactory2 implemented interface of a factory object.
  Clear | Deletes the data from the GroupItem list in memory. | 
  GroupList | The list of top-level GroupItem objects. | 
  IsClear | Checks if the GroupingManager contains any data. True if there is no data. | 
  ItemList | The list of references to the members of the group. | 
  Refresh | Fetches the GroupList according to the Filter and Group values, overwriting the list in memory. |