@java.lang.Override
    public Builder clone() {
      return super.clone();
    }
<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