Segmented State pattern.

For more information, refer to the following resources:

Triple documentation

Flutter Triple package

Triple Pattern: A new pattern for state management in Flutter
(blog post written in Portuguese but can be auto-translated)

VIDEO: Flutter Triple Pattern by Kevlin Ossada (recorded in English)

solidart

A simple but powerful state management solution inspired by SolidJS.

Official Documentation

solidart package

flutter_solidart package

flutter_reactive_widget

Also includes a definition for PersistentReactiveValue, a subclass
of ReactiveValue whose latest value persists, surviving app
restarts.

flutter_reactive_widget source and documentation

Simple app state management