HTML template in Dart?

template.dart

renderPage() =>
  html(
    head([
      title('Create category'),
      defaultHead(),
      style(include('../../styles/treeselect.css')),
    ]),
    body([
      breadcrumb(),
      container([
        form(action: '/category/create', method: 'POST', c: [
          formGroup([
            input(
              type: 'hidden',
              name: 'subject.descriptor.translations.0.locale.code',
              value: 'en_US'),
            label(forInput: 'subject.descriptor.translations.0.content'),
            input(
              type: 'text',
              name: 'subject.descriptor.translations.0.content')
          ])
        ])
      ])
    ])
  );