public Builder mergeFrom(com.google.cloud.texttospeech.v1.ListVoicesResponse other) {
      if (other == com.google.cloud.texttospeech.v1.ListVoicesResponse.getDefaultInstance())
        return this;
      if (voicesBuilder_ == null) {
        if (!other.voices_.isEmpty()) {
          if (voices_.isEmpty()) {
            voices_ = other.voices_;
            bitField0_ = (bitField0_ & ~0x00000001);
          } else {
            ensureVoicesIsMutable();
            voices_.addAll(other.voices_);
          }
          onChanged();
        }
      } else {
        if (!other.voices_.isEmpty()) {
          if (voicesBuilder_.isEmpty()) {
            voicesBuilder_.dispose();
            voicesBuilder_ = null;
            voices_ = other.voices_;
            bitField0_ = (bitField0_ & ~0x00000001);
            voicesBuilder_ =
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                    ? getVoicesFieldBuilder()
                    : null;
          } else {
            voicesBuilder_.addAllMessages(other.voices_);
          }
        }
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
The message returned to the client by the `ListVoices` method.
</pre>

Protobuf type {@code google.cloud.texttospeech.v1.ListVoicesResponse}
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesResponse.java