Constructor parameter names are erased even when keepparameternames is specified.

[dmitryb-dev]

I have next config (clipped):

keepclassmembers("""class mypkg.** {
        <init>(...);
}""")
keepparameternames()

So to make my kotlin classes work with Jackson I need to keep all constructor parameter names, but I still want class names to be obfuscated, so I'm using keepclassmembers instead of keep. But ProGuard seems to remove or keep both classname and constructor params together...