code: public Observable<Page<NetworkInterfaceInner>> listAsync(final String resourceGroupName, final String loadBalancerName) {
          return listWithServiceResponseAsync(resourceGroupName, loadBalancerName)
              .map(new Func1<ServiceResponse<Page<NetworkInterfaceInner>>, Page<NetworkInterfaceInner>>() {
                  @Override
                  public Page<NetworkInterfaceInner> call(ServiceResponse<Page<NetworkInterfaceInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets associated load balancer network interfaces.
  
  @param resourceGroupName The name of the resource group.
  @param loadBalancerName The name of the load balancer.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;NetworkInterfaceInner&gt; object