facetBy doesn't work with namedGroup

[llinggit]

White testing facetBy and bucketGroup, we found it doesn't work. And it doesn't work with namedGroup either. It needs a conversion as below
builtPlan = p.fromLiterals(numberRows).facetBy((PlanExprColSeq) p.namedGroup("r"));

builtPlan = p.fromLiterals(numberRows).facetBy((PlanExprColSeq) p.bucketGroup(p.xs.string("r"), p.col("r"), p.xs.integerSeq(2,4)));

So we can address your issue, please include the following:

Version of MarkLogic Java Client API

See Readme.txt

Version of MarkLogic Server

See admin gui on port 8001 or run xdmp:version() in Query Console - port 8000)

Java version

Run java -version

OS and version

For MAC, run sw_vers.
For Windows, run systeminfo | findstr /B /C:"OS Name" /C:"OS Version"
For Linux, run cat /etc/os-release and uname -r

Input: Some code to illustrate the problem, preferably in a state that can be independently reproduced on our end

Actual output: What did you observe? What errors did you see? Can you attach the logs? (Java logs, MarkLogic logs)

Expected output: What specifically did you expect to happen?

Alternatives: What else have you tried, actual/expected?