code: @BetaApi
    public final Policy getIamPolicyImage(ProjectGlobalImageResourceName resource) {
  
      GetIamPolicyImageHttpRequest request =
          GetIamPolicyImageHttpRequest.newBuilder()
              .setResource(resource == null ? null : resource.toString())
              .build();
      return getIamPolicyImage(request);
    }
docs: Gets the access control policy for a resource. May be empty if no such policy or resource
  exists.
  
  <p>Sample code:
  
  <pre><code>
  try (ImageClient imageClient = ImageClient.create()) {
  ProjectGlobalImageResourceName resource = ProjectGlobalImageResourceName.of("[PROJECT]", "[RESOURCE]");
  Policy response = imageClient.getIamPolicyImage(resource);
  }
  </code></pre>
  
  @param resource Name or id of the resource for this request.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails