FieldRepository::getLastActivityBy

public function getLastActivityBy(string $fieldName = Item::FIELD_NAME_LAST_ACTIVITY_BY): ScalarField
{
	return
		(new IntegerField($fieldName))
			->configureDefaultValue(static function () {
				return Container::getInstance()->getContext()->getUserId();
			})
			->configureTitle(Loc::getMessage('CRM_TYPE_ITEM_FIELD_LAST_ACTIVITY_BY'))
	;
}