Method constructor

resources/vega-lite.min.js:7706–7712

(e, t, n)

      return new uf(null, this.model, l(this.filter));
    }
    constructor(e, t, n) {
      (super(e),
        (this.model = t),
        (this.filter = n),
        (this.expr = mf(this.model, this.filter, this)),
        (this._dependentFields = cf(this.expr)));
    }
    dependentFields() {
      return this._dependentFields;
    }