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Group Aggregations 
· Header (1..1)
Aggregation for a title, which is implemented using a Caption UI element.
You can create this aggregation for the Group in the View Designer in the UI tree from the context menu (entry Insert Header).
· Toolbar (0..1)
Aggregation for a Toolbar within the group.
You can create this aggregation in the View Designer in the UI tree from the context menu (entry Insert Toolbar).