public Builder mergeFrom(
          com.google.cloud.translate.v3.AdaptiveMtTranslateRequest.ReferenceSentencePairList
              other) {
        if (other
            == com.google.cloud.translate.v3.AdaptiveMtTranslateRequest.ReferenceSentencePairList
                .getDefaultInstance()) return this;
        if (referenceSentencePairsBuilder_ == null) {
          if (!other.referenceSentencePairs_.isEmpty()) {
            if (referenceSentencePairs_.isEmpty()) {
              referenceSentencePairs_ = other.referenceSentencePairs_;
              bitField0_ = (bitField0_ & ~0x00000001);
            } else {
              ensureReferenceSentencePairsIsMutable();
              referenceSentencePairs_.addAll(other.referenceSentencePairs_);
            }
            onChanged();
          }
        } else {
          if (!other.referenceSentencePairs_.isEmpty()) {
            if (referenceSentencePairsBuilder_.isEmpty()) {
              referenceSentencePairsBuilder_.dispose();
              referenceSentencePairsBuilder_ = null;
              referenceSentencePairs_ = other.referenceSentencePairs_;
              bitField0_ = (bitField0_ & ~0x00000001);
              referenceSentencePairsBuilder_ =
                  com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                      ? getReferenceSentencePairsFieldBuilder()
                      : null;
            } else {
              referenceSentencePairsBuilder_.addAllMessages(other.referenceSentencePairs_);
            }
          }
        }
        this.mergeUnknownFields(other.getUnknownFields());
        onChanged();
        return this;
      }
<pre>
A list of reference sentence pairs.
</pre>

Protobuf type {@code
google.cloud.translation.v3.AdaptiveMtTranslateRequest.ReferenceSentencePairList}
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/AdaptiveMtTranslateRequest.java