{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"//"}]}
        // call site which do not have a macro backtrace. See #61963.
        // FIXME(davidtwco): This is a hack to detect macros which produce spans of the
        if span.edition().at_least_edition_future() && self.features.explicit_extern_abis() {