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