code: public List<DataPoint> getDataList() {
          List<DataPoint> dataListCopy = new LinkedList<eu.hansolo.steelseries.tools.DataPoint>();
          dataListCopy.addAll(DATA_LIST);
          return dataListCopy;
      }
docs: Returns the linked list that contains the current data of the sparkline
  @return the linked list that contains the current data of the sparkline