private static ListCustomClassesFixedSizeCollection createEmptyCollection() {
      return new ListCustomClassesFixedSizeCollection(null, 0);
    }
Delete a custom class.

<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 (AdaptationClient adaptationClient = AdaptationClient.create()) {
  DeleteCustomClassRequest request =
      DeleteCustomClassRequest.newBuilder()
          .setName(CustomClassName.of("[PROJECT]", "[LOCATION]", "[CUSTOM_CLASS]").toString())
          .build();
  ApiFuture<Empty> future = adaptationClient.deleteCustomClassCallable().futureCall(request);
  // Do something.
  future.get();
}
}</pre>
java-speech/google-cloud-speech/src/main/java/com/google/cloud/speech/v1p1beta1/AdaptationClient.java