public Builder clearTargetSentence() {
        targetSentence_ = getDefaultInstance().getTargetSentence();
        bitField0_ = (bitField0_ & ~0x00000002);
        onChanged();
        return this;
      }
<pre>
Target sentence in the sentence pair.
</pre>

<code>string target_sentence = 2;</code>

@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/AdaptiveMtTranslateRequest.java