{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"&MatcherLoc::SequenceKleeneOpAfterSep"}]}
                &MatcherLoc::SequenceKleeneOpAfterSep { idx_first } => {
                }
                    // We are past the sequence separator. This can't be a `?` Kleene op, because