Function $m

resources/vega.min.js:13035–13037

(t, e)

    t.globalCompositeOperation = e.blend || "source-over";
  }
  function $m(t, e) {
    return null == t ? e : t;
  }
  function Tm(t, e) {
    const n = e.length;
    for (let r = 0; r < n; ++r) t.addColorStop(e[r].offset, e[r].color);