private void buildPartial0(com.google.cloud.texttospeech.v1beta1.ListVoicesRequest result) {
      int from_bitField0_ = bitField0_;
      if (((from_bitField0_ & 0x00000001) != 0)) {
        result.languageCode_ = languageCode_;
      }
    }
<pre>
The top-level message sent by the client for the `ListVoices` method.
</pre>

Protobuf type {@code google.cloud.texttospeech.v1beta1.ListVoicesRequest}
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesRequest.java