Saxon

It's complicated by the fact that the XsltTransformer has another property called Implementation which returns something different! Also, the misspelt property has no documentation to say what it is, so the chances are it's not being used.

I'm going to change the Implemmentation property (sic) to WrappedXsltTransformer.

I'm also going to drop the undocumented method GetUnderlyingDestination() which doesn't seem to do what anyone would expect.

XsltTransformer.GetUnderlyingDestination() reinstated so that EEN builds. Otherwise get failure (in gradle build task een_csharpApi):

error CS0535: Saxon.Api.XsltTransformer' does not implement interface member Saxon.Api.XmlDestination.GetUnderlyingDestination()'