{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"ty::Region::new_early_param(tcx,"}]}
                ty::Region::new_early_param(tcx, ty::EarlyParamRegion { index, name })
                let index = generics.param_def_id_to_index[&def_id.to_def_id()];
            }