code: public FutureData<PushSubscription> update(String id, PushConnector connector, String name) {
          if (id == null || id.isEmpty() || connector == null) {
              throw new IllegalArgumentException("A push subscription ID and output parameters is required");
          }
          FutureData<PushSubscription> future = new FutureData<>();
          URI uri = newParams().forURL(config.newAPIEndpointURI(UPDATE));
          POST request = config.http()
                  .POST(uri, new PageReader(newRequestCallback(future, new PushSubscription(), config)))
                  .form("id", id);
          for (Map.Entry<String, String> e : connector.parameters().verifyAndGet().entrySet()) {
              request.form(e.getKey(), e.getValue());
          }
          if (name != null && !name.isEmpty()) {
              request.form("name", name);
          }
          performRequest(future, request);
          return future;
      }
docs: /*
  Updates the name or output parameters for a push sucription
  
  @param id        the subscription ID
  @param connector the output parameters to update to
  @param name      an optional name to update with
  @return the updated push subscription