{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"self.tcx.def_path_str(trait_info.def_id),"}]}
                        self.tcx.def_path_str(trait_info.def_id),
                        "the trait `{}` defines an item `{}`, but is explicitly unimplemented",
                        item_name