code: public Observable<ServiceResponse<Page<AvailableServiceSkuInner>>> listSkusSinglePageAsync(final String groupName, final String serviceName) {
          if (this.client.subscriptionId() == null) {
              throw new IllegalArgumentException("Parameter this.client.subscriptionId() is required and cannot be null.");
          }
          if (groupName == null) {
              throw new IllegalArgumentException("Parameter groupName is required and cannot be null.");
          }
          if (serviceName == null) {
              throw new IllegalArgumentException("Parameter serviceName is required and cannot be null.");
          }
          if (this.client.apiVersion() == null) {
              throw new IllegalArgumentException("Parameter this.client.apiVersion() is required and cannot be null.");
          }
          return service.listSkus(this.client.subscriptionId(), groupName, serviceName, this.client.apiVersion(), this.client.acceptLanguage(), this.client.userAgent())
              .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<Page<AvailableServiceSkuInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<AvailableServiceSkuInner>>> call(Response<ResponseBody> response) {
                      try {
                          ServiceResponse<PageImpl<AvailableServiceSkuInner>> result = listSkusDelegate(response);
                          return Observable.just(new ServiceResponse<Page<AvailableServiceSkuInner>>(result.body(), result.response()));
                      } catch (Throwable t) {
                          return Observable.error(t);
                      }
                  }
              });
      }
docs: Get compatible SKUs.
  The services resource is the top-level resource that represents the Data Migration Service. The skus action returns the list of SKUs that a service resource can be updated to.
  
  ServiceResponse<PageImpl<AvailableServiceSkuInner>> * @param groupName Name of the resource group
  ServiceResponse<PageImpl<AvailableServiceSkuInner>> * @param serviceName Name of the service
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the PagedList&lt;AvailableServiceSkuInner&gt; object wrapped in {@link ServiceResponse} if successful.