{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"//"}]}
                    // in which case rustc ignores the helper attributes from the latter, but it
                    // NOTE: The item *may* have both `#[rustc_builtin_macro]` and `#[proc_macro_derive]`,
                    // "doesn't make sense in practice" (see rust-lang/rust#87027).