{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"Sequence(DelimSpan,"}]}
    Sequence(DelimSpan, SequenceRepetition),
    /// A kleene-style repetition sequence, e.g. `$($e:expr)*` (RHS) or `$($e),*` (LHS).
    /// e.g., `$var`. The span covers the leading dollar and the ident. (The span within the ident