code: private byte[] columnNameAsByteArray(String column, CfDef cfDef)
      {
          return TBaseHelper.byteBufferToByteArray(columnNameAsBytes(column, cfDef));
      }
docs: Converts column name into byte[] according to comparator type
  @param column - column name from parser
  @param cfDef  - column family from parser
  @return bytes[] - into which column name was converted according to comparator type