Landing::getByIdAction

public function getByIdAction(int $landingId): ?array
{
	$res = LandingCore::getList([
		'select' => [
			'*'
		],
		'filter' => [
			'ID' => $landingId
		]
	]);
	if ($row = $res->fetch())
	{
		$row['ADDITIONAL_FIELDS'] = LandingCore::getAdditionalFieldsAsArray($landingId);
		return $row;
	}

	return null;
}