{"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"let"}]}
    let typeck_root_def_id = tcx.typeck_root_def_id(def_id);
pub(crate) fn region_scope_tree(tcx: TyCtxt<'_>, def_id: DefId) -> &ScopeTree {
    if typeck_root_def_id != def_id {