java.util.List<Expression> args = x.getArguments();
StringConstant.Lexical sort = (org.rascalmpl.ast.StringConstant.Lexical)
x.getArguments().get(0).getLiteral().getStringLiteral().getConstant();
IList rest = vf.list(Factory.Symbol);
for (Expression arg: ((Expression.List)args.get(1)).getElements()) {
rest = rest.append(arg.accept(this));
}
return vf.constructor(Factory.Symbol_ParameterizedSort, vf.string(sort.getString()), rest);
}