code: @BetaApi
    public final Operation setDefaultNetworkTierProject(
        ProjectName project,
        ProjectsSetDefaultNetworkTierRequest projectsSetDefaultNetworkTierRequestResource) {
  
      SetDefaultNetworkTierProjectHttpRequest request =
          SetDefaultNetworkTierProjectHttpRequest.newBuilder()
              .setProject(project == null ? null : project.toString())
              .setProjectsSetDefaultNetworkTierRequestResource(
                  projectsSetDefaultNetworkTierRequestResource)
              .build();
      return setDefaultNetworkTierProject(request);
    }
docs: Sets the default network tier of the project. The default network tier is used when an
  address/forwardingRule/instance is created without specifying the network tier field.
  
  <p>Sample code:
  
  <pre><code>
  try (ProjectClient projectClient = ProjectClient.create()) {
  ProjectName project = ProjectName.of("[PROJECT]");
  ProjectsSetDefaultNetworkTierRequest projectsSetDefaultNetworkTierRequestResource = ProjectsSetDefaultNetworkTierRequest.newBuilder().build();
  Operation response = projectClient.setDefaultNetworkTierProject(project, projectsSetDefaultNetworkTierRequestResource);
  }
  </code></pre>
  
  @param project Project ID for this request.
  @param projectsSetDefaultNetworkTierRequestResource
  @throws com.google.api.gax.rpc.ApiException if the remote call fails