checkConflictsOnTarget example

  }

  /** * {@inheritdoc} */
  public function publish() {
    if ($this->sourceWorkspace->hasParent()) {
      throw new WorkspacePublishException('Only top-level workspaces can be published.');
    }

    if ($this->checkConflictsOnTarget()) {
      throw new WorkspaceConflictException();
    }

    $tracked_entities = $this->workspaceAssociation->getTrackedEntities($this->sourceWorkspace->id());
    $event = new WorkspacePrePublishEvent($this->sourceWorkspace, $tracked_entities);
    $this->eventDispatcher->dispatch($event);

    if ($event->isPublishingStopped()) {
      throw new WorkspacePublishException((string) $event->getPublishingStoppedReason());
    }

    

  }

  /** * {@inheritdoc} */
  public function merge() {
    if (!$this->sourceWorkspace->hasParent() || $this->sourceWorkspace->parent->target_id != $this->targetWorkspace->id()) {
      throw new \InvalidArgumentException('The contents of a workspace can only be merged into its parent workspace.');
    }

    if ($this->checkConflictsOnTarget()) {
      throw new WorkspaceConflictException();
    }

    try {
      $transaction = $this->database->startTransaction();
      foreach ($this->getDifferringRevisionIdsOnSource() as $entity_type_id => $revision_difference) {
        $revisions_on_source = $this->entityTypeManager->getStorage($entity_type_id)
          ->loadMultipleRevisions(array_keys($revision_difference));

        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        foreach ($revisions_on_source as $revision) {