Generated code references private class constructor which leads to compile error

Reflectable should either handle private classes gracefully or somehow ignore them.

When I generate for my project Reflectable somehow includes the _StringStacktrace class from dart.core:

r.NonGenericClassMirrorImpl(
r'_StringStackTrace',
r'dart.core._StringStackTrace',
134217767,
80,
const prefix0.TomReflector(),
const [1192, 1193],
const [162, 1192, 164, 165, 166],
const [],
41,
{},
{},
{
r'': (bool b) =>
(_stackTrace) => b ? _StringStackTrace(_stackTrace) : null,
},
14, ...

The line

(_stackTrace) => b ? _StringStackTrace(_stackTrace) : null,

results in a compiler error "The function '_StringStackTrace' isn't defined."

I got this specific case several times in different projects, but it obviously depends on what parts of the dare libraries are used. I actually haven't figured out what exactly trigger this problem. I also got a similar error once from one of my classes which I resolved by changing the classname to not have the underscore prefix.

As I'm generating not automatically to save time by only generating from time to time I can simply fix this manually every time I generate, but this doesn't sound like a final solution to me.