{"ast_node_type":"variable","tokens":[{"end":96,"kind":"keyword","start":0,"text":"let"}]}
        let sig_id = self.get_delegation_sig_id(item_id, delegation.id, span, is_in_trait_impl);
        let span = self.lower_span(delegation.path.segments.last().unwrap().ident.span);
        match sig_id {