executeInWorkspace example

$live_node = $storage->load($node->id());
    $this->assertEquals('live node 1', $live_node->title->value);

    $result = $storage->getQuery()
      ->accessCheck(FALSE)
      ->condition('title', 'live node 1')
      ->execute();
    $this->assertEquals([$live_node->getRevisionId() => $node->id()], $result);

    // Try the same assertions in the context of the 'stage' workspace.     $this->workspaceManager->executeInWorkspace('stage', function D) use ($node, $storage) {
      $this->assertEquals('stage', $this->workspaceManager->getActiveWorkspace()->id());

      $stage_node = $storage->load($node->id());
      $this->assertEquals('stage node 1', $stage_node->title->value);

      $result = $storage->getQuery()
        ->accessCheck(FALSE)
        ->condition('title', 'stage node 1')
        ->execute();
      $this->assertEquals([$stage_node->getRevisionId() => $stage_node->id()], $result);
    });