code: @BetaApi
    public final Project getXpnHostProject(String project) {
  
      GetXpnHostProjectHttpRequest request =
          GetXpnHostProjectHttpRequest.newBuilder().setProject(project).build();
      return getXpnHostProject(request);
    }
docs: Gets the shared VPC host project that this project links to. May be empty if no link exists.
  
  <p>Sample code:
  
  <pre><code>
  try (ProjectClient projectClient = ProjectClient.create()) {
  ProjectName project = ProjectName.of("[PROJECT]");
  Project response = projectClient.getXpnHostProject(project.toString());
  }
  </code></pre>
  
  @param project Project ID for this request.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails