public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
        return com.google.cloud.vision.v1.ProductSearchServiceProto
            .internal_static_google_cloud_vision_v1_Product_KeyValue_descriptor;
      }
<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