}
        }
    }
}


private class BuilderCache<From, To : KtSymbol> {
    private val cache = ContainerUtil.createConcurrentWeakKeySoftValueMap<From, To>()

    inline fun <reified S : To> cache(key: From, calculation: () -> S): S {
        val value = cache.getOrPut(key, calculation)
        return value as? S
            ?: errorWithAttachment("Cannot cast ${value::class} to ${S::class}") {