@java.lang.Override
  public com.google.cloud.texttospeech.v1beta1.CustomPronunciations getCustomPronunciations() {
    return customPronunciations_ == null
        ? com.google.cloud.texttospeech.v1beta1.CustomPronunciations.getDefaultInstance()
        : customPronunciations_;
  }
<pre>
Optional. The pronunciation customizations to be applied to the input. If
this is set, the input will be synthesized using the given pronunciation
customizations.

The initial support will be for EFIGS (English, French,
Italian, German, Spanish) languages, as provided in
VoiceSelectionParams. Journey and Instant Clone voices are
not supported yet.

In order to customize the pronunciation of a phrase, there must be an exact
match of the phrase in the input types. If using SSML, the phrase must not
be inside a phoneme tag (entirely or partially).
</pre>

<code>
.google.cloud.texttospeech.v1beta1.CustomPronunciations custom_pronunciations = 3 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return The customPronunciations.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInput.java