code: public Observable<RunGetLogResultInner> getLogSasUrlAsync(String resourceGroupName, String registryName, String runId) {
          return getLogSasUrlWithServiceResponseAsync(resourceGroupName, registryName, runId).map(new Func1<ServiceResponse<RunGetLogResultInner>, RunGetLogResultInner>() {
              @Override
              public RunGetLogResultInner call(ServiceResponse<RunGetLogResultInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets a link to download the run logs.
  
  @param resourceGroupName The name of the resource group to which the container registry belongs.
  @param registryName The name of the container registry.
  @param runId The run ID.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the RunGetLogResultInner object