Custom widget in ExpanderRow
Currently it's only possible to set a title/subtitle in the actual row. There are few use cases where it makes sense to add a custom widget to that area.
Example - Fragments:
Before expander row:
With expander row:
I don't need the title/subtitle area in this case - I want to put the progressbar and so on in that place.
Of course this would also possible with a custom row - but that also means that the interesting styling gets lost.