{"ast_node_type":"function","tokens":[{"end":80,"kind":"keyword","start":0,"text":"fn"}]}
    fn expansion_span_map(&self, file_id: MacroCallId) -> Arc<ExpansionSpanMap>;
    #[salsa::invoke(crate::span_map::expansion_span_map)]
    #[salsa::invoke(crate::span_map::real_span_map)]