Function _

docs/tests/v2/es6/js/sanddance.js:92155–92155

(unit, p, key)

  const s = step || 1,
        b = (0, _vegaUtil.peek)(units),
        _ = (unit, p, key) => skip(fn[key || unit], unit === b && s, p);

  const t = new Date(),
        u = (0, _vegaUtil.toSet)(units),