code: public Observable<Page<ResourceHealthMetadataInner>> listBySiteSlotNextAsync(final String nextPageLink) {
          return listBySiteSlotNextWithServiceResponseAsync(nextPageLink)
              .map(new Func1<ServiceResponse<Page<ResourceHealthMetadataInner>>, Page<ResourceHealthMetadataInner>>() {
                  @Override
                  public Page<ResourceHealthMetadataInner> call(ServiceResponse<Page<ResourceHealthMetadataInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets the category of ResourceHealthMetadata to use for the given site as a collection.
  Gets the category of ResourceHealthMetadata to use for the given site as a collection.
  
  @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;ResourceHealthMetadataInner&gt; object