code: public Observable<Page<VirtualNetworkLinkInner>> listAsync(final String resourceGroupName, final String privateZoneName, final Integer top) {
          return listWithServiceResponseAsync(resourceGroupName, privateZoneName, top)
              .map(new Func1<ServiceResponse<Page<VirtualNetworkLinkInner>>, Page<VirtualNetworkLinkInner>>() {
                  @Override
                  public Page<VirtualNetworkLinkInner> call(ServiceResponse<Page<VirtualNetworkLinkInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Lists the virtual network links to the specified Private DNS zone.
  
  @param resourceGroupName The name of the resource group.
  @param privateZoneName The name of the Private DNS zone (without a terminating dot).
  @param top The maximum number of virtual network links to return. If not specified, returns up to 100 virtual network links.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;VirtualNetworkLinkInner&gt; object