presto-parser/src/main/java/io/prestosql/sql/tree/IntervalLiteral.java/IntervalLiteral/IntervalLiteral
class IntervalLiteral:    public IntervalLiteral(NodeLocation location, String value, Sign sign, IntervalField startField, Optional<IntervalField> endField)
    {
        this(Optional.of(location), value, sign, startField, endField);
    }