tableViewChanged property
Contains Listenable that route widget will subscribe to in order to rebuild.
The null value here will lead to controls not updating whenever the TableView or SliverTableView changes
by something else other than the controls themselves; which might be ok if the controls are the only way the
table changes.
Can be changed at any time (except SchedulerPhase.persistentCallbacks).
Implementation
final ValueNotifier<Listenable?> tableViewChanged;