code: public ServiceFuture<List<NodeFile>> listFromTaskNextAsync(final String nextPageLink, final ServiceFuture<List<NodeFile>> serviceFuture, final ListOperationCallback<NodeFile> serviceCallback) {
          return AzureServiceFuture.fromHeaderPageResponse(
                  listFromTaskNextSinglePageAsync(nextPageLink),
                  new Func1<String, Observable<ServiceResponseWithHeaders<Page<NodeFile>, FileListFromTaskHeaders>>>() {
                      @Override
                      public Observable<ServiceResponseWithHeaders<Page<NodeFile>, FileListFromTaskHeaders>> call(String nextPageLink) {
                          return listFromTaskNextSinglePageAsync(nextPageLink, null);
                      }
                  },
                  serviceCallback);
      }
docs: Lists the files in a task's directory on its compute node.
  
  @param nextPageLink The NextLink from the previous successful call to List operation.
  @param serviceFuture the ServiceFuture object tracking the Retrofit calls
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object