OptionalallowAllow implicit block via indentation (no explicit open/close)
OptionalcloseClosing delimiter in input (e.g., '}', ']', '|')
OptionalendIf false, don't emit separator after last item
OptionaljsClosing delimiter in output (null to suppress)
OptionaljsItem separator in output (null to suppress)
OptionaljsOpening delimiter in output (null to suppress)
OptionalnextItem separator in input (e.g., ',', ';')
OptionalopenOpening delimiter in input (e.g., '{', '[', '|')
Options for parsing delimited or indented groups. Used by
s.parseGroup()to handle blocks like{...},[...], or indented blocks.