/// <reference path="fourslash.ts" />

/////**
//// * @callback Foo
//// * @param {string} data
//// * @param {/**/number} [index] - comment
//// * @return {boolean}
//// */
////
/////** @type {Foo} */
////const foo = s => !(s.length % 2);

verify.baselineSmartSelection();