{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":".map(|s|"}]}
                            .map(|s| self.psess.source_map().span_until_non_whitespace(s));
                            .trim_start(comma_tok.span.shrink_to_lo())
                        first_etc_and_maybe_comma_span = nw_span.map(|s| etc_sp.to(s));