code: public <T> void initializeAutoTaggingAndResubscriptionInTargetClassOnly(T target,
        Class<T> targetClass) {
      Preconditions.checkNotNull(target, "Target cannot be null");
      ResubscribeHelper.initializeAutoTaggingAndResubscriptionInTargetClassOnly(target,
          targetClass, this);
    }
docs: Unlike {@link #initializeAutoTaggingAndResubscription(Object)} superclasses will
  <b>not</b> be initialized; only the fields in {@code targetClass} will be initialized.
  <p>
  Sets a unique tag on all Observer fields of {@code target}
  that are annotated with {@link AutoTag} or {@link AutoResubscribe}.
  <p>
  Subscribe all Observer fields on the {@code target}
  that are annotated with {@link AutoResubscribe}
  and that have their corresponding Observable in flight.
  <p>
  Resubscribes all Observer fields on the target that are annotated with
  {@link AutoResubscribe} and that have their corresponding Observable in flight.
  <p>