dispose method
Closes the semantics handle.
When all the outstanding SemanticsHandle objects are closed, the framework will stop generating semantics information.
Implementation
@mustCallSuper
void dispose() {
// TODO(polina-c): stop duplicating code across disposables
// https://github.com/flutter/flutter/issues/137435
if (kFlutterMemoryAllocationsEnabled) {
FlutterMemoryAllocations.instance.dispatchObjectDisposed(object: this);
}
_onDispose();
}