default void deleteProductSet(
        com.google.cloud.vision.v1.DeleteProductSetRequest request,
        io.grpc.stub.StreamObserver<com.google.protobuf.Empty> responseObserver) {
      io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(
          getDeleteProductSetMethod(), responseObserver);
    }
<pre>
Permanently deletes a ProductSet. Products and ReferenceImages in the
ProductSet are not deleted.
The actual image files are not deleted from Google Cloud Storage.
</pre>
java-vision/grpc-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/ProductSearchGrpc.java