getAllRevisionNames example

$entity->name = 'bar';
    $entity->save();

    // Sync a change to the 'name' on the original revision ID.     $original_revision = $storage->loadRevision($original_revision_id);
    $original_revision->setSyncing(TRUE);
    $original_revision->name = 'baz';
    $original_revision->save();

    // The names of each revision should reflect two revisions, the original one     // having been updated during a sync.     $this->assertEquals(['baz', 'bar'], $this->getAllRevisionNames($entity));
  }

  /** * Tests a moderation state changed on a previous revision during a sync. */
  public function testStateChangedPreviousRevisionDuringSync() {
    $storage = $this->container->get('entity_type.manager')->getStorage('entity_test_mulrevpub');

    $entity = EntityTestMulRevPub::create([
      'moderation_state' => 'published',
      'name' => 'foo',
    ]);