code: public Observable<ServiceResponse<Page<NetworkInterfaceIPConfigurationInner>>> listVirtualMachineScaleSetIpConfigurationsWithServiceResponseAsync(final String resourceGroupName, final String virtualMachineScaleSetName, final String virtualmachineIndex, final String networkInterfaceName) {
          return listVirtualMachineScaleSetIpConfigurationsSinglePageAsync(resourceGroupName, virtualMachineScaleSetName, virtualmachineIndex, networkInterfaceName)
              .concatMap(new Func1<ServiceResponse<Page<NetworkInterfaceIPConfigurationInner>>, Observable<ServiceResponse<Page<NetworkInterfaceIPConfigurationInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<NetworkInterfaceIPConfigurationInner>>> call(ServiceResponse<Page<NetworkInterfaceIPConfigurationInner>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(listVirtualMachineScaleSetIpConfigurationsNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }
docs: Get the specified network interface ip configuration in a virtual machine scale set.
  
  @param resourceGroupName The name of the resource group.
  @param virtualMachineScaleSetName The name of the virtual machine scale set.
  @param virtualmachineIndex The virtual machine index.
  @param networkInterfaceName The name of the network interface.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;NetworkInterfaceIPConfigurationInner&gt; object