{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"hir::ItemKind::Impl(hir::Impl"}]}
            hir::ItemKind::Impl(hir::Impl { of_trait: Some(_), .. }) => {
        let vtable_entries = match tcx.hir_item(id).kind {
                let trait_ref = tcx.impl_trait_ref(def_id).unwrap().instantiate_identity();