public function render()
{
$name = $this->getName();
$this->registerFieldNameForFormTokenGeneration($name);
$this->addAdditionalIdentityPropertiesIfNeeded();
$this->tag->addAttribute('type', 'submit');
$this->tag->addAttribute('name', $name);
$this->tag->addAttribute('value', $this->getValueAttribute(true));
return $this->tag->render();
}