rxgroups/src/main/java/com/airbnb/rxgroups/ObservableGroup.java
public <T> void initializeAutoTaggingAndResubscriptionInTargetClassOnly(T target,
      Class<T> targetClass) {
    Preconditions.checkNotNull(target, "Target cannot be null");
    ResubscribeHelper.initializeAutoTaggingAndResubscriptionInTargetClassOnly(target,
        targetClass, this);
  }
public <T> void initializeAutoTaggingAndResubscriptionInTargetClassOnly(T target,
      Class<T> targetClass) {
    Preconditions.checkNotNull(target, "Target cannot be null");
    ResubscribeHelper.initializeAutoTaggingAndResubscriptionInTargetClassOnly(target,
        targetClass, this);
  }
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>