}

    private fun FirExpression.findSourceKtExpressionForCallArgument(): KtExpression? {
        // For smart-casted expression, refer to the source of the original expression
        // For spread, named, and lambda arguments, the source is the KtValueArgument.
        // For other arguments (including array indices), the source is the KtExpression.
        return when (this) {
            is FirSamConversionExpression ->