Landing::mergeAdditionalFieldsForReplace

static function mergeAdditionalFieldsForReplace(array $data, array $additionalFieldsSite): array
{
	$additionalFields = $data['ADDITIONAL_FIELDS'] ?? [];
	foreach (self::getAdditionalFieldsForReplace($additionalFieldsSite) as $code => $field)
	{
		if (!isset($additionalFields[$code]))
		{
			$additionalFields[$code] = $field;
		}
	}
	$data['ADDITIONAL_FIELDS'] = $additionalFields;

	return $data;
}