statementCall method
Implementation
Parser<ProcedureStatementNode> statementCall() => seq2(
ref0(identifier),
seq3(
ref1(token, '('),
ref0(expression)
.plusSeparated(ref1(token, ','))
.map((sep) => sep.elements),
ref1(token, ')'),
).map3((_, args, _) => args).optionalWith(const <ExpressionNode>[]),
).map2((name, args) => ProcedureStatementNode(name: name, arguments: args));