{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
    // nice to remove these since we already have the `kind` in the placeholder; we really just need
    // These three maps track the bound variable that were replaced by placeholders. It might be
    // the `var` (but we *could* bring that into scope if we were to track them as we pass them).