/**
* Set the HTML code for the button.
*
* @param GetPasteRootButtonEvent $event The event being emitted.
*
* @param string $value The value returned by the callback.
*
* @return void
*/
public function update($event, $value)
{
if ($value === null) {
return;
}
$event->setHtml($value);
$event->stopPropagation();
}