code: public Observable<Page<ResourceHealthMetadataInner>> listAsync() {
          return listWithServiceResponseAsync()
              .map(new Func1<ServiceResponse<Page<ResourceHealthMetadataInner>>, Page<ResourceHealthMetadataInner>>() {
                  @Override
                  public Page<ResourceHealthMetadataInner> call(ServiceResponse<Page<ResourceHealthMetadataInner>> response) {
                      return response.body();
                  }
              });
      }
docs: List all ResourceHealthMetadata for all sites in the subscription.
  List all ResourceHealthMetadata for all sites in the subscription.
  
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;ResourceHealthMetadataInner&gt; object