I am using the a datagrid which is grouped by 2 properties which cannot be changed by the user (the GroupByControl is hidden). I would like to be able to customise the headers for my groups on both level 0 and 1, but I only appear able to set a GroupConfiguration for one level of grouping. If I try and set different GroupConfigurations for the two groups the level 1 group header will appear fine, but the level 0 header will disappear. If I then remove the level 1 group configuration the level 0 header will appear fine. What can I do to achieve (different) custom group headers at 2 levels?
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