A tree item's icon.
A bare string is a theme icon id ('folder', 'error'), which is the common case by a wide margin. The object forms cover a coloured theme icon and image files, including a light/dark pair.
'folder'
'error'
A tree item's icon.
A bare string is a theme icon id (
'folder','error'), which is the common case by a wide margin. The object forms cover a coloured theme icon and image files, including a light/dark pair.