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