{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"#[salsa::invoke(expand_proc_macro)]"}]}
    #[salsa::invoke(expand_proc_macro)]
    /// @edwin0cheng heroically debugged this once! See #4315 for details
    fn expand_proc_macro(&self, call: MacroCallId) -> ExpandResult<Arc<tt::TopSubtree>>;