@Suppress("USELESS_IS_CHECK") // K2 warning suppression, TODO: KT-62472
                require(fir is FirQualifiedAccessExpression)
                when (unsubstitutedKtSignature.symbol) {
                    is KtVariableLikeSymbol -> {
                        @Suppress("UNCHECKED_CAST") // safe because of the above check on targetKtSymbol
                        KtSimpleVariableAccessCall(