}

        fun unwrapType(type: PsiElement?): KtTypeElement = when (type) {
            is KtTypeReference -> unwrapType(type.typeElement)
            is KtNullableType -> type.innerType
            is KtTypeElement -> type
            is KtNameReferenceExpression -> unwrapType(type.parent)
            else -> unexpectedElementError<PsiElement>(type)
        } ?: unexpectedElementError<PsiElement>(type)