Function sortRef

resources/vega.min.js:32706–32713

(t)

        );
      },
      sortRef(t) {
        if (!t) return t;
        const e = tO(t.op, t.field),
          n = t.order || "ascending";
        return n.signal
          ? XN(this.add(bO({ fields: e, orders: this.signalRef(n.signal) })))
          : QN(e, n);
      },
      event(t, e) {
        const n = t + ":" + e;
        if (!this.events[n]) {