public Builder setTargetSentence(java.lang.String value) {
        if (value == null) {
          throw new NullPointerException();
        }
        targetSentence_ = value;
        bitField0_ |= 0x00000002;
        onChanged();
        return this;
      }
<pre>
Target sentence in the sentence pair.
</pre>

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

@param value The targetSentence to set.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/AdaptiveMtTranslateRequest.java