Technically, ITreeGridItem.Expanded should not be true if it is not expandable, but in the case that perhaps it is true but you don't want it to expand then that should be supported. This fixes issues dropping after items if they report expanded but are not expandable.
Technically,
ITreeGridItem.Expanded
should not be true if it is not expandable, but in the case that perhaps it is true but you don't want it to expand then that should be supported. This fixes issues dropping after items if they report expanded but are not expandable.