This guide refers to the old version of the WYF module, which is no longer maintained. We strongly recommend visiting the updated guide which will guide you on how to integrate the new visual component, MapView.
To stay up to date, checkout the Flutter SDK Changelog and visit the migration guide to ease the transition to the new library.
The Flutter Wayfinding repository will guide you step by step to set up your first Flutter application using Situm WYF. It contains the plugin source code with a ready-to-run example application.