{"ast_node_type":"variable","tokens":[{"end":43,"kind":"keyword","start":0,"text":"let"}]}
        let sugg_span = match &invoc.kind {
            .map(|&InvocationParent { parent_def: mod_def_id, .. }| mod_def_id);
            InvocationKind::Attr { item: Annotatable::Item(item), .. }