code: @BetaApi
    public final BackendService getRegionBackendService(
        ProjectRegionBackendServiceName backendService) {
  
      GetRegionBackendServiceHttpRequest request =
          GetRegionBackendServiceHttpRequest.newBuilder()
              .setBackendService(backendService == null ? null : backendService.toString())
              .build();
      return getRegionBackendService(request);
    }
docs: Returns the specified regional BackendService resource.
  
  <p>Sample code:
  
  <pre><code>
  try (RegionBackendServiceClient regionBackendServiceClient = RegionBackendServiceClient.create()) {
  ProjectRegionBackendServiceName backendService = ProjectRegionBackendServiceName.of("[PROJECT]", "[REGION]", "[BACKEND_SERVICE]");
  BackendService response = regionBackendServiceClient.getRegionBackendService(backendService);
  }
  </code></pre>
  
  @param backendService Name of the BackendService resource to return.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails