private
    fun apiTypeFor(sourceName: String, classBytes: () -> ByteArray): () -> ApiType = {
        ApiType(asmLevel, incubatingAnnotationTypeDescriptor, sourceName, classNodeFor(classBytes), context)
    }

    private
    fun classNodeFor(classBytesSupplier: () -> ByteArray): () -> ApiTypeClassNode = {
        ApiTypeClassNode(asmLevel).also {
            ClassReader(classBytesSupplier()).accept(it, SKIP_CODE or SKIP_FRAMES)