{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"for"}]}
                for var_hir_id in upvars.keys() {
            if let Some(upvars) = self.tcx.upvars_mentioned(closure_def_id) {
                    let place = self.place_for_root_variable(closure_def_id, *var_hir_id);