public String getMeasurement(int index) {
    return measurementList.get(index);
  }
This method is used by last read. Comparator<Binary> and Comparator<String> behaves differently
and that is why we use Comparator<Binary> here.

@param comparator
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/path/AlignedPath.java