Function normalizeToArray

_benchmarks/sample_echarts.js:7238–7240

* If value is not array, then translate it to array. * @param {*} value * @return {Array} [value] or value

(value)

     */

    function normalizeToArray(value) {
      return value instanceof Array ? value : value == null ? [] : [value];
    }
    /**
     * Sync default option between normal and emphasis like `position` and `show`
     * In case some one will write code like