Function isDataItemOption

_benchmarks/sample_echarts.js:7291–7294

* data could be [12, 2323, {value: 223}, [1221, 23], {value: [2, 23]}] * This helper method determine if dataItem has extra option besides value

(dataItem)

     */

    function isDataItemOption(dataItem) {
      return isObject(dataItem) && !(dataItem instanceof Array); // // markLine data can be array
      // && !(dataItem[0] && isObject(dataItem[0]) && !(dataItem[0] instanceof Array));
    }
    /**
     * Mapping to existings for merge.
     *