@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(glossary_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, glossary_);
    }
    if (ignoreCase_ != false) {
      output.writeBool(2, ignoreCase_);
    }
    if (contextualTranslationEnabled_ != false) {
      output.writeBool(4, contextualTranslationEnabled_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
Optional. If set to true, the glossary will be used for contextual
translation.
</pre>

<code>bool contextual_translation_enabled = 4 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The contextualTranslationEnabled.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/TranslateTextGlossaryConfig.java