.class property cannot be removed or changed weight
The .class property of an object cannot be removed
and the weight of the .class property of an object cannot be changed.
Only value of the .class property can be changed. You can change the
value or weight of other properties such as .classindex.map.ui.find.quick.stringempty
Validate action row failed. The original .class property
and its weight are retained.
Do not remove the .class property or its weight.