Github user afs commented on the issue:
https://github.com/apache/jena/pull/299
> Making `checkTriple` protected in `ParserProfileStd` would be an even
better idea.
That does not work because the `ParserProfileStd` supplied to
`TurtleStarReaderRIOT` has already been created, which is why the suggestion is
to use a forwarding proxy object (the wrapper) with public access to the
"check" operations.
> another constructor to `TurtleShell`
Could you send in a pull request please?---
