Note: old_value field of AtkPropertyValues will not contain a valid value. This is a field defined with the purpose of contain the previous value of the property, but is not used anymore.
The new value of the named property.
NULL. This field is not used anymore.
The name of the ATK property which has changed.
Note: old_value field of AtkPropertyValues will not contain a valid value. This is a field defined with the purpose of contain the previous value of the property, but is not used anymore.