inputs.dart

 Widget beerInfoInputsWidget() {
    return Column(
      children: [
        Padding(
          padding: const EdgeInsets.only(left: 3, bottom: 4.0),
          child: TextField(
              controller: nameController,
              onChanged: (v) => nameController.text = v,
              decoration: InputDecoration(
                labelText: 'Name the beer',
              )),
        ),
        Padding(
          padding: const EdgeInsets.only(left: 3, bottom: 4.0),
          child: TextField(
              controller: countryController,
              onChanged: (v) => countryController.text = v,
              decoration: InputDecoration(
                labelText: "Country name",
              )),
        ),
        Padding(
          padding: const EdgeInsets.only(left: 3),
          child: TextField(
              controller: abvController,
              onChanged: (v) => abvController.text = v,
              decoration: InputDecoration(
                labelText: 'ABV',
              )),
        ),
        Padding(
          padding: const EdgeInsets.all(16.0),
          child: Builder(
            builder: (context) {
              return RaisedButton(
                onPressed: () => {},
                color: Colors.lightBlue,
                child: Text('Add beer'),
              );
            },
          ),
        ),
      ],
    );
  }