{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
    let trait_ref = tcx.normalize_erasing_regions(typing_env, trait_ref);
    let typing_env = ty::TypingEnv::fully_monomorphized();
    let overridden_methods = tcx.impl_item_implementor_ids(item.owner_id);