{"ast_node_type":"variable","tokens":[{"end":100,"kind":"keyword","start":0,"text":"let"}]}
            let opaque_ty = tcx.hir_node_by_def_id(opaque_def_id.expect_local()).expect_opaque_ty();
        Some(ty::ImplTraitInTraitData::Trait { opaque_def_id, .. }) => {
            let bounds =