{"ast_node_type":"other","tokens":[{"end":112,"kind":"keyword","start":0,"text":"//"}]}
        // per crate. Though that is likely not a problem as `MacroCallId`s are already crate calling dependent.
        // The bigger issue is that this will cause interning to now create completely separate chains
        pub fn outer_expn<Db>(self, db: &'db Db) -> Option<MacroCallId>