{"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"let"}]}
        let is_marker_overlap = is_marker_impl(trait_ref1) && is_marker_impl(trait_ref2);
        let is_marker_impl = |trait_ref: TraitRef<'_>| self.trait_def(trait_ref.def_id).is_marker;