code: public Observable<Page<NetworkInterfaceIPConfigurationInner>> listVirtualMachineScaleSetIpConfigurationsNextAsync(final String nextPageLink) {
          return listVirtualMachineScaleSetIpConfigurationsNextWithServiceResponseAsync(nextPageLink)
              .map(new Func1<ServiceResponse<Page<NetworkInterfaceIPConfigurationInner>>, Page<NetworkInterfaceIPConfigurationInner>>() {
                  @Override
                  public Page<NetworkInterfaceIPConfigurationInner> call(ServiceResponse<Page<NetworkInterfaceIPConfigurationInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Get the specified network interface ip configuration in a virtual machine scale set.
  
  @param nextPageLink The NextLink from the previous successful call to List operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;NetworkInterfaceIPConfigurationInner&gt; object