public Builder mergeFrom(com.google.cloud.visionai.v1.FacetGroup other) {
      if (other == com.google.cloud.visionai.v1.FacetGroup.getDefaultInstance()) return this;
      if (!other.getFacetId().isEmpty()) {
        facetId_ = other.facetId_;
        bitField0_ |= 0x00000001;
        onChanged();
      }
      if (!other.getDisplayName().isEmpty()) {
        displayName_ = other.displayName_;
        bitField0_ |= 0x00000002;
        onChanged();
      }
      if (bucketsBuilder_ == null) {
        if (!other.buckets_.isEmpty()) {
          if (buckets_.isEmpty()) {
            buckets_ = other.buckets_;
            bitField0_ = (bitField0_ & ~0x00000004);
          } else {
            ensureBucketsIsMutable();
            buckets_.addAll(other.buckets_);
          }
          onChanged();
        }
      } else {
        if (!other.buckets_.isEmpty()) {
          if (bucketsBuilder_.isEmpty()) {
            bucketsBuilder_.dispose();
            bucketsBuilder_ = null;
            buckets_ = other.buckets_;
            bitField0_ = (bitField0_ & ~0x00000004);
            bucketsBuilder_ =
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                    ? getBucketsFieldBuilder()
                    : null;
          } else {
            bucketsBuilder_.addAllMessages(other.buckets_);
          }
        }
      }
      if (other.bucketType_ != 0) {
        setBucketTypeValue(other.getBucketTypeValue());
      }
      if (other.getFetchMatchedAnnotations() != false) {
        setFetchMatchedAnnotations(other.getFetchMatchedAnnotations());
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
A group of facet buckets to be passed back and forth between backend &amp;
frontend.
</pre>

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