text: export default function(P = Promise, timeout = setTimeout) {
    // var interval;
    return function(milliseconds, cb) {
      // clearInterval(interval);
      // const cb = typeof _cb !== 'function' ? (i) => { clearInterval(interval);interval = i; } : _cb;
      return new P((resolve, reject) => {
        cb(
          timeout(function() {
            resolve(milliseconds);
          }, milliseconds)
        );
      });
    };
  }
  