WorkgroupSender::getSubscribedUsers

private function getSubscribedUsers(): array
{
	if ($this->subscribedUsers === null)
	{
		$query = BitrixPullModelWatchTable::query();
		$query->addSelect('USER_ID');
		$query->where('TAG', PullDictionary::PULL_WORKGROUPS_TAG);
		$this->subscribedUsers = array_column($query->fetchAll(), 'USER_ID');
	}

	return $this->subscribedUsers;
}