{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"tcx.mk_args_from_iter(target_args.iter().chain(self.iter().skip(defs.count())))"}]}
        tcx.mk_args_from_iter(target_args.iter().chain(self.iter().skip(defs.count())))
        let defs = tcx.generics_of(source_ancestor);
    }