presto-main/src/main/java/io/prestosql/sql/relational/DeterminismEvaluator.java/Visitor/visitSpecialForm
class Visitor:        @Override
        public Boolean visitSpecialForm(SpecialForm specialForm, Void context)
        {
            return specialForm.getArguments().stream()
                    .allMatch(expression -> expression.accept(this, context));
        }