>>> (indent 4)
    return new Container(
        key: 'ChatApp',
        children: [
          new Container(
              key: 'Content',
              style: _content_style,
              children: appChildren)]);
<<<
    return new Container(key: 'ChatApp', children: [
      new Container(
          key: 'Content', style: _content_style, children: appChildren)
    ]);
>>> (indent 10)
          return new Container(
              key: 'ChatApp',
              children: [
                new Container(
                    key: 'Content',
                    style: _content_style,
                    children: appChildren)]);
<<<
          return new Container(key: 'ChatApp', children: [
            new Container(
                key: 'Content', style: _content_style, children: appChildren)
          ]);