{"ast_node_type":"other","tokens":[{"end":154,"kind":"keyword","start":0,"text":"//"}]}
// https://github.com/rust-lang/rust/commit/b90cfc887c31c3e7a9e6d462e2464db1fe506175#diff-43914724af6e464c1da2171e4a9b6c7e607d5bc1203fa95c0ab85be4122605ef
// to compare their performance, see
// for an example of how to do so.