function isDataItemOption(dataItem) {
  return isObject(dataItem) && !(dataItem instanceof Array); // // markLine data can be array
  // && !(dataItem[0] && isObject(dataItem[0]) && !(dataItem[0] instanceof Array));
}
data could be [12, 2323, {value: 223}, [1221, 23], {value: [2, 23]}]
This helper method determine if dataItem has extra option besides value