None
          @view_config(renderer="templates/form.pt", name="checkbox")
    @demonstrate("Checkbox Widget")
    def checkbox(self):
        class Schema(colander.Schema):
            want = colander.SchemaNode(
                colander.Boolean(),
                description="Check this box!",
                widget=deform.widget.CheckboxWidget(),
                title="I Want It!",
            )
        schema = Schema()
        form = deform.Form(schema, buttons=("submit",))
        return self.render_form(form)