i.e. Id expected this to work ```data class Extra...

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[ursus]

i.e. Id expected this to work

data class ExtractedEpubImpl(
        private val epub: EPub,
        override val extractPath: String
) : ExtractedEpub by epub

however it does not, I could make it implement multiple interfaces like so

data class ExtractedEpubImpl2(
        private val epub: EPub,
        override val extractPath: String
) : EPub by epub, ExtractedEpub

this works, but looks super weird, since Epub <- ExtractedEpub