@Suppress("DEPRECATION_ERROR")
    private fun KtTypeReference.toKotlinTypeReference(): FirTypeRef {
        // Maybe resolve all types here to not to work with FirTypeRef directly
        return PsiRawFirBuilder(
            createEmptySession(),
            DummyScopeProvider,
            bodyBuildingMode = BodyBuildingMode.NORMAL

        // TODO: Ideally, we should get the substitutor from the candidate. But it seems there is no way to get the substitutor from the
        //  candidate, `Candidate.substitutor` is not complete. maybe we can carry over the final substitutor if it's available from
        //  body resolve phase?
        val substitutor = when (fir) {