of static method
Implementation
static DialogHandler of(BuildContext context) {
final DialogHandler? handler = context
.dependOnInheritedWidgetOfExactType<InheritedDialogManager>()
?.dialogHandler;
assert(
handler != null,
'DialogManager operation requested with a context that does not include a DialogManager.'
'The context used to show dialogs from the DialogManager must be that of a '
'widget that is a descendant of a DialogManager widget.',
);
return handler!;
}