code: public function untick()
      {
          if ('checkbox' !== $type = $this->element->getAttribute('type')) {
              throw new \LogicException(\sprintf('You cannot tick "%s" as it is not a checkbox (%s).', $this->element->getAttribute('name'), $type));
          }
  
          $this->setValue(false);
      }
docs: Ticks a checkbox.
  
  @throws \LogicException When the type provided is not correct