DynamicTypeSearchContentBuilder::extractUserIdsFromItems

protected function extractUserIdsFromItems(array $items): array
{
	$fieldsWithUsers = $this->getFieldsWithUsers();
	$userIds = [];
	foreach ($items as $item)
	{
		foreach ($fieldsWithUsers as $fieldName)
		{
			$userIds = $item->get($fieldName);
		}
	}

	$userIds = array_filter($userIds, function($id)
	{
		return !empty($id);
	});
	$userIds = array_unique($userIds);

	return $userIds;
}