presto-main/src/main/java/io/prestosql/sql/planner/DesugarRowSubscriptRewriter.java/DesugarRowSubscriptRewriter/Visitor
class DesugarRowSubscriptRewriter:        public Visitor(Map<NodeRef<Expression>, Type> expressionTypes)
        {
            this.expressionTypes = ImmutableMap.copyOf(requireNonNull(expressionTypes, "expressionTypes is null"));
        }