CBPDocument :: OnDocumentDelete: Bitrix method

      
<?php 
//  CBPDocument :: OnDocumentDelete()
//  /dist/bitrix/modules/bizproc/classes/general/document.php:486

    public static function OnDocumentDelete($documentId, &$errors)
    {
        $errors = [];

        $instanceIds = WorkflowInstanceTable::getIdsByDocument($documentId);
        foreach ($instanceIds as $instanceId)
        {
            static::TerminateWorkflow($instanceId, $documentId, $errors);
        }

        $statesIds = \CBPStateService::getIdsByDocument($documentId);
        foreach ($statesIds as $stateId)
        {
            \CBPTaskService::DeleteByWorkflow($stateId);
            \CBPTrackingService::DeleteByWorkflow($stateId);
        }

        \CBPStateService::deleteCompletedStates($documentId);
        CBPHistoryService::DeleteByDocument($documentId);
    }