code: public Task<Void> updateSyncFrequency(@NonNull final SyncFrequency syncFrequency) {
      return this.dispatcher.dispatchTask(new Callable<Void>() {
        @Override
        public Void call() throws Exception {
          SyncImpl.this.proxy.updateSyncFrequency(syncFrequency);
          return null;
        }
      });
    }
docs: Sets the SyncFrequency on this collection.
  
  @param syncFrequency the SyncFrequency that contains all the desired options
  
  @return A Task that completes when the SyncFrequency has been updated