public final OperationFuture<CustomClass, OperationMetadata> createCustomClassAsync(
      String parent, CustomClass customClass, String customClassId) {
    CreateCustomClassRequest request =
        CreateCustomClassRequest.newBuilder()
            .setParent(parent)
            .setCustomClass(customClass)
            .setCustomClassId(customClassId)
            .build();
    return createCustomClassAsync(request);
  }
Creates a [CustomClass][google.cloud.speech.v2.CustomClass].

<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 (SpeechClient speechClient = SpeechClient.create()) {
  String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
  CustomClass customClass = CustomClass.newBuilder().build();
  String customClassId = "customClassId1871032322";
  CustomClass response =
      speechClient.createCustomClassAsync(parent, customClass, customClassId).get();
}
}</pre>

@param parent Required. The project and location where this CustomClass will be created. The
    expected format is `projects/{project}/locations/{location}`.
@param customClass Required. The CustomClass to create.
@param customClassId The ID to use for the CustomClass, which will become the final component
    of the CustomClass's resource name.
    <p>This value should be 4-63 characters, and valid characters are /[a-z][0-9]-/.
@throws com.google.api.gax.rpc.ApiException if the remote call fails
java-speech/google-cloud-speech/src/main/java/com/google/cloud/speech/v2/SpeechClient.java