@Override
  public int delete(long lowerBound, long upperBound) {
    int deletedNumber = 0;
    for (int i = 0; i < dataTypes.size(); i++) {
      deletedNumber += delete(lowerBound, upperBound, i).left;
    }
    return deletedNumber;
  }
Get whether value is null at the given position in AlignedTvList.

@param unsortedRowIndex value index inside this column
@param columnIndex index of the column
@return boolean
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/utils/datastructure/AlignedTVList.java