code: public Observable<Page<PoolNodeCounts>> listPoolNodeCountsAsync() {
          return listPoolNodeCountsWithServiceResponseAsync()
              .map(new Func1<ServiceResponseWithHeaders<Page<PoolNodeCounts>, AccountListPoolNodeCountsHeaders>, Page<PoolNodeCounts>>() {
                  @Override
                  public Page<PoolNodeCounts> call(ServiceResponseWithHeaders<Page<PoolNodeCounts>, AccountListPoolNodeCountsHeaders> response) {
                      return response.body();
                  }
              });
      }
docs: Gets the number of nodes in each state, grouped by pool.
  
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;PoolNodeCounts&gt; object