term method
Implementation
Parser<Term> term() => seq2(
ref0(atom),
seq3(
ref1(token, '('),
ref0(parameter)
.plusSeparated(ref1(token, ','))
.map((list) => list.elements),
ref1(token, ')'),
).map3((_, params, _) => params).optional(),
).map2((atom, params) => Term(atom.toString(), params ?? const []));