Function XN

resources/vega.min.js:30421–30424

(t)

    return GN("operator", t, e);
  }
  function XN(t) {
    const e = { $ref: t.id };
    return (t.id < 0 && (t.refs = t.refs || []).push(e), e);
  }
  function JN(t, e) {
    return e ? { $field: t, $name: e } : { $field: t };
  }