ItemFieldsCaster::internalizeFieldId

static function internalizeFieldId(string $fieldId): string
{
	$map = [
		Crm\Item::FIELD_NAME_OBSERVERS => 'OBSERVER_IDS',
		Crm\Item::FIELD_NAME_PRODUCTS => 'PRODUCT_IDS',
		Crm\Item::FIELD_NAME_CONTACTS => 'CONTACT_IDS',
	];

	return $map[$fieldId] ?? $fieldId;
}