I have managed to get an extension function example working for 9.5 HE, but the class Sequence has me flummoxed. I can't find the documentation, among other things, and I've spend half an hour searching for it. Where are the docs for 9.5 HE, especially Sequence and ExtensionFunctionCall.call()?
Any working code samples are welcome. I'll post my example to Github later today, I guess.