Function rU

resources/vega.min.js:31961–31965

(t)

    return null;
  }
  function rU(t) {
    const e = {};
    for (const n of t) if (n) for (const t in n) e[t] = 1;
    return Object.keys(e);
  }
  function iU(t, e) {
    return { scale: t.scale, range: e };
  }