onEmptyActionPressed - How can I get the entered not existed value?

[aaongr]

The onEmptyActionPressed is executed when the user enter a value, this value does not exists in the items and the user click on the "Create new".

Inside the
onEmptyActionPressed: () async {
},
how can I get the entered value that it is not exists in the items?

[maximatt]

I'm facing in the same situation as @agorneo

[Abdelaty]

same here, Tried to attach a controller to the widget, then print its value when onEmptyActionPressed: () triggered. But nothing happened.