code: public Observable<Page<DataLakeAnalyticsAccountBasicInner>> listByResourceGroupAsync(final String resourceGroupName) {
          return listByResourceGroupWithServiceResponseAsync(resourceGroupName)
              .map(new Func1<ServiceResponse<Page<DataLakeAnalyticsAccountBasicInner>>, Page<DataLakeAnalyticsAccountBasicInner>>() {
                  @Override
                  public Page<DataLakeAnalyticsAccountBasicInner> call(ServiceResponse<Page<DataLakeAnalyticsAccountBasicInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets the first page of Data Lake Analytics accounts, if any, within a specific resource group. This includes a link to the next page, if any.
  
  @param resourceGroupName The name of the Azure resource group.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;DataLakeAnalyticsAccountBasicInner&gt; object