public final CustomClass updateCustomClass(CustomClass customClass, FieldMask updateMask) {
    UpdateCustomClassRequest request =
        UpdateCustomClassRequest.newBuilder()
            .setCustomClass(customClass)
            .setUpdateMask(updateMask)
            .build();
    return updateCustomClass(request);
  }
Update 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()) {
  CustomClass customClass = CustomClass.newBuilder().build();
  FieldMask updateMask = FieldMask.newBuilder().build();
  CustomClass response = adaptationClient.updateCustomClass(customClass, updateMask);
}
}</pre>

@param customClass Required. The custom class to update.
    <p>The custom class's `name` field is used to identify the custom class to be updated.
    Format:
    <p>`projects/{project}/locations/{location}/customClasses/{custom_class}`
    <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.
@param updateMask The list of fields to be updated.
@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