TaskFieldHandler::prepareMark

public function prepareMark(): self
{
	$validValues = array_values(Mark::getAll());

	if (
		array_key_exists('MARK', $this->fields)
		&& !in_array($this->fields['MARK'], $validValues)
	)
	{
		unset($this->fields['MARK']);
	}

	return $this;
}