public final ListCustomClassesPagedResponse listCustomClasses(LocationName parent) {
    ListCustomClassesRequest request =
        ListCustomClassesRequest.newBuilder()
            .setParent(parent == null ? null : parent.toString())
            .build();
    return listCustomClasses(request);
  }
List custom classes.

<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()) {
  LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
  for (CustomClass element : adaptationClient.listCustomClasses(parent).iterateAll()) {
    // doThingsWith(element);
  }
}
}</pre>

@param parent Required. The parent, which owns this collection of custom classes. Format:
    <p>`projects/{project}/locations/{location}/customClasses`
    <p>Speech-to-Text supports three locations: `global`, `us` (US North America), and `eu`
    (Europe). If you are calling the `speech.googleapis.com` endpoint, use the `global`
    location. To specify a region, use a [regional
    endpoint](https://cloud.google.com/speech-to-text/docs/endpoints) with matching `us` or
    `eu` location value.
@throws com.google.api.gax.rpc.ApiException if the remote call fails
java-speech/google-cloud-speech/src/main/java/com/google/cloud/speech/v1p1beta1/AdaptationClient.java