private fun computeErrorCallClassId(call: FirGetClassCall): ClassId? {
        val qualifierParts = mutableListOf<String?>()

        fun process(expression: FirExpression) {
            val errorType = expression.resolvedType as? ConeErrorType
            val unresolvedName = when (val diagnostic = errorType?.diagnostic) {
                is ConeUnresolvedTypeQualifierError -> diagnostic.qualifier