<?php
// CBPAllStateService :: getIdsByDocument()
// /dist/bitrix/modules/bizproc/classes/general/stateservice.php:271
public static function getIdsByDocument(array $documentId)
{
$documentId = \CBPHelper::ParseDocumentId($documentId);
$rows = WorkflowStateTable::getList([
'select' => ['ID'],
'filter' => [
'=MODULE_ID' => $documentId[0],
'=ENTITY' => $documentId[1],
'=DOCUMENT_ID' => $documentId[2]
]
])->fetchAll();
return array_column($rows, 'ID');
}