@view_config(renderer='templates/form.pt', name='checkboxchoice')
    @demonstrate('Checkbox Choice Widget')
    def checkboxchoice(self):
        choices = (('habanero', 'Habanero'),
                   ('jalapeno', 'Jalapeno'),
                   ('chipotle', 'Chipotle'))

        class Schema(colander.Schema):
            pepper = colander.SchemaNode(
                colander.Set(),
                widget=deform.widget.CheckboxChoiceWidget(values=choices),
                validator=colander.Length(min=1),
                )
        schema = Schema()
        form = deform.Form(schema, buttons=('submit',))
        return self.render_form(form)