method public static ExternalChannel::getAdditionalFieldsForEdit() Класс: \Bitrix\Crm\Activity\Provider\ExternalChannel Сигнатура public static getAdditionalFieldsForEdit(array<string|int, mixed> $activity) : mixed Параметры $activity array<string|int, mixed> Возвращаемое значение mixed Исходный файл: source/crm/lib/activity/provider/externalchannel.php:305