/**
  * Create a new test task. The task will operate on the backed database, and will use the proper
  * background executor service.
  *
  * @return Test task initialized to clean up {@value #TOP_LEVEL} and its children.
  */
 public final DatastoreTestTask newTestTask() {
   return new DatastoreTestTask(datastore, dclExecutorService)
       .cleanup(DatastoreTestTask.simpleDelete(TOP_LEVEL));
 }
 public static final WriteTransactionCustomizer deleteNested(
     final String topName, final String nestedName) {
   return DatastoreTestTask.simpleDelete(path(topName, nestedName));
 }