work around weird AMA

something with private classes and defaults,
the default getter will be in the private companion module,
but there's no accessor to get the module???
maybe something related to make non-private of the accessor?

while running test  presentation/ide-t1000567
AbstractMethodError: scala.tools.nsc.interactive.Global$$anon$5.scala$tools$nsc$typechecker$Contexts$$BufferingReporter()Lscala/tools/nsc/typechecker/Contexts$BufferingReporter$;
 at scala.tools.nsc.typechecker.Contexts$Context.makeSilent(Contexts.scala:518)