{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"\"original_poly_trait_ref={:?}"}]}
                        "original_poly_trait_ref={:?} upcast_trait_ref={:?} target_trait={:?}",
                    debug!(
                        original_poly_trait_ref, upcast_trait_ref, trait_def_id