{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":".expect(\"span_to_lines"}]}
                    .expect("span_to_lines failed when emitting suggestion");
                    .span_to_lines(parts[0].span.shrink_to_hi())
                let line_num = sm.lookup_char_pos(parts[0].span.lo()).line;