public Builder mergeFrom(com.google.cloud.vision.v1.Product.KeyValue other) {
        if (other == com.google.cloud.vision.v1.Product.KeyValue.getDefaultInstance()) return this;
        if (!other.getKey().isEmpty()) {
          key_ = other.key_;
          bitField0_ |= 0x00000001;
          onChanged();
        }
        if (!other.getValue().isEmpty()) {
          value_ = other.value_;
          bitField0_ |= 0x00000002;
          onChanged();
        }
        this.mergeUnknownFields(other.getUnknownFields());
        onChanged();
        return this;
      }
<pre>
A product label represented as a key-value pair.
</pre>

Protobuf type {@code google.cloud.vision.v1.Product.KeyValue}
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/Product.java