update
fun AdministrativeUnitNameEntity.updateSubAdminArea(subAdminArea: String?): AdministrativeUnitNameEntity
Updates the subAdminArea property of the current AdministrativeUnitNameEntity to use a new value.
If the provided subAdminArea is null, the existing subAdminArea value is preserved.
Return
the updated AdministrativeUnitNameEntity object.
Parameters
sub
the new sub admin area name to update (can be null).