public com.google.cloud.texttospeech.v1beta1.CustomPronunciationParams.Builder
        addPronunciationsBuilder() {
      return getPronunciationsFieldBuilder()
          .addBuilder(
              com.google.cloud.texttospeech.v1beta1.CustomPronunciationParams.getDefaultInstance());
    }
<pre>
The pronunciation customizations to be applied.
</pre>

<code>
repeated .google.cloud.texttospeech.v1beta1.CustomPronunciationParams pronunciations = 1;
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/CustomPronunciations.java