public function bootstrapFormButtonSubmitFunction() {

        $txt = $this->getTranslator()->trans("label.submit", [], "WBWBootstrapBundle");
        $but = $this->getButtonTwigExtension()->bootstrapButtonPrimaryFunction(["content" => $txt, "title" => $txt, "icon" => "g:ok"]);

        return $this->getButtonTwigExtension()->bootstrapButtonSubmitFilter($but);
    }