{"ast_node_type":"import","tokens":[{"end":58,"kind":"keyword","start":0,"text":"//"}]}
    // this will change the span to point at the use site.
    // point directly at external macros. Since these are often difficult to read,
    fn fix_multispans_in_extern_macros(&self, span: &mut MultiSpan, children: &mut Vec<Subdiag>) {