code: @BetaApi
    public final Operation insertBackendService(
        ProjectName project, BackendService backendServiceResource) {
  
      InsertBackendServiceHttpRequest request =
          InsertBackendServiceHttpRequest.newBuilder()
              .setProject(project == null ? null : project.toString())
              .setBackendServiceResource(backendServiceResource)
              .build();
      return insertBackendService(request);
    }
docs: Creates a BackendService resource in the specified project using the data included in the
  request. There are several restrictions and guidelines to keep in mind when creating a backend
  service. Read Restrictions and Guidelines for more information.
  
  <p>Sample code:
  
  <pre><code>
  try (BackendServiceClient backendServiceClient = BackendServiceClient.create()) {
  ProjectName project = ProjectName.of("[PROJECT]");
  BackendService backendServiceResource = BackendService.newBuilder().build();
  Operation response = backendServiceClient.insertBackendService(project, backendServiceResource);
  }
  </code></pre>
  
  @param project Project ID for this request.
  @param backendServiceResource A BackendService resource. This resource defines a group of
  backend virtual machines and their serving capacity. (== resource_for v1.backendService ==)
  (== resource_for beta.backendService ==)
  @throws com.google.api.gax.rpc.ApiException if the remote call fails