{"ast_node_type":"function","tokens":[{"end":66,"kind":"keyword","start":0,"text":"fn"}]}
    fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
    #[instrument(level = "trace", skip(self, tcx, body))]
        debug!("elaborate_drops({:?} @ {:?})", body.source, body.span);