Important
Flutter SDK v2.0.0 Breaking Change to Generated Files
Flutter SDK version 2.0.0 introduces an update to the
builder, which impacts how files generate. In v2.0.0 and later, all
generated files use the .realm.dart naming convention instead of .g.dart.
This is a breaking change for existing apps. For information on how to upgrade an existing app from an earlier SDK version to v2.0.0 or later, refer to :ref:`flutter-upgrade-v2`.