@SuppressWarnings({"rawtypes"})
  @java.lang.Override
  protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
      int number) {
    switch (number) {
      case 13:
        return internalGetAnnotations();
      default:
        throw new RuntimeException("Invalid map field number: " + number);
    }
  }
<pre>
A set of words or phrases that represents a common concept likely to appear
in your audio, for example a list of passenger ship names. CustomClass items
can be substituted into placeholders that you set in PhraseSet phrases.
</pre>

Protobuf type {@code google.cloud.speech.v1p1beta1.CustomClass}
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/CustomClass.java