docs: public ServiceFuture<List<VirtualMachineScaleSetVMInner>> listAsync(final String resourceGroupName, final String virtualMachineScaleSetName, final ListOperationCallback<VirtualMachineScaleSetVMInner> serviceCallback) {
          return AzureServiceFuture.fromPageResponse(
              listSinglePageAsync(resourceGroupName, virtualMachineScaleSetName),
              new Func1<String, Observable<ServiceResponse<Page<VirtualMachineScaleSetVMInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<VirtualMachineScaleSetVMInner>>> call(String nextPageLink) {
                      return listNextSinglePageAsync(nextPageLink);
                  }
              },
              serviceCallback);
      }