intro-to-flutter-29.dart

@override
Widget build(BuildContext context) => Scaffold(
      body: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 16),
          child: Column(
            children: <Widget>[
              const _Logo(),
              _buildEmailField(),
              _buildPasswordField(),
              _buildSubmitButton(),
              _buildChangeEnvironmentButton()
            ],
          ),
        ),
      ),
    );