public final UnaryCallable<ListProductsInProductSetRequest, ListProductsInProductSetPagedResponse>
      listProductsInProductSetPagedCallable() {
    return stub.listProductsInProductSetPagedCallable();
  }
Lists the Products in a ProductSet, in an unspecified order. If the ProductSet does not exist,
the products field of the response will be empty.

<p>Possible errors:

<ul>
  <li>Returns INVALID_ARGUMENT if page_size is greater than 100 or less than 1.
</ul>

<p>Sample code:

<pre>{@code
// This snippet has been automatically generated and should be regarded as a code template only.
// It will require modifications to work:
// - It may require correct/in-range values for request initialization.
// - It may require specifying regional endpoints when creating the service client as shown in
// https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
try (ProductSearchClient productSearchClient = ProductSearchClient.create()) {
  ListProductsInProductSetRequest request =
      ListProductsInProductSetRequest.newBuilder()
          .setName(ProductSetName.of("[PROJECT]", "[LOCATION]", "[PRODUCT_SET]").toString())
          .setPageSize(883849137)
          .setPageToken("pageToken873572522")
          .build();
  ApiFuture<Product> future =
      productSearchClient.listProductsInProductSetPagedCallable().futureCall(request);
  // Do something.
  for (Product element : future.get().iterateAll()) {
    // doThingsWith(element);
  }
}
}</pre>
java-vision/google-cloud-vision/src/main/java/com/google/cloud/vision/v1/ProductSearchClient.java