(Set<MaterialState> states) {
                return states.contains(MaterialState.disabled)
                    ? null
                    : Colors.blue;
              }),
            ),
            onPressed: null,
            child: const Text('Sign up'),
          ),
        ],
      ),
    );
  }
}
{$ end main.dart $}
{$ begin test.dart $}
// Avoid warning on "double _formProgress = 0;"
//ignore_for_file: prefer_final_fields
{$ end test.dart $}