Method optimize

javascript/src/serializer.js:531–537

* @return {!ee.api.Expression}

()

   * @return {!ee.api.Expression}
   */
  optimize() {
    const result = this.optimizeReference(this.rootReference);
    return new ee.api.Expression({
      result,
      values: this.optimizedValues,
    });
  }

  /**
   * @param {string} ref