code: public PubsubFuture<Subscription> createSubscription(final String canonicalSubscriptionName,
                                                         final String canonicalTopic) {
      return createSubscription(Subscription.of(canonicalSubscriptionName, canonicalTopic));
    }
docs: Create a Pub/Sub subscription.
  
  @param canonicalSubscriptionName The canonical (including project) name of the scubscription to create.
  @param canonicalTopic            The canonical (including project) name of the topic to subscribe to.
  @return A future that is completed when this request is completed.