I'm still seeing the _Print member. Either I dind't test it properly last time or the behavior has regressed
Repro:
Go to XmlProvider.fsx in F# Data (https://github.com/fsharp/FSharp.Data/blob/master/docs/content/library/XmlProvider.fsx#L276)
and add the type t = OutputXml.OrderLine line:

I'm still seeing the _Print member. Either I dind't test it properly last time or the behavior has regressed
Repro:
Go to XmlProvider.fsx in F# Data (https://github.com/fsharp/FSharp.Data/blob/master/docs/content/library/XmlProvider.fsx#L276)
and add the
type t = OutputXml.OrderLineline: