@view_config(renderer='templates/form.pt', name='hidden_field')
    @demonstrate('Hidden Field Widget')
    def hidden_field(self):
        class Schema(colander.Schema):
            sneaky = colander.SchemaNode(
                colander.Boolean(),
                widget = deform.widget.HiddenWidget(),
                default=True,
                )
        schema = Schema()
        form = deform.Form(schema, buttons=('submit',))
        return self.render_form(form)