docs: private ColumnPair doToModel(DataColumnPairDO dataColumnPairDo) {
  
          Column sourceColumn = dataColumnPairDo.getSourceColumnName() == null ? null : new Column(
                                                                                                   dataColumnPairDo.getSourceColumnName());
          Column targetColumn = dataColumnPairDo.getTargetColumnName() == null ? null : new Column(
                                                                                                   dataColumnPairDo.getTargetColumnName());
          ColumnPair columnPair = new ColumnPair(sourceColumn, targetColumn);
          columnPair.setId(dataColumnPairDo.getId());
          columnPair.setDataMediaPairId(dataColumnPairDo.getDataMediaPairId());
          columnPair.setGmtCreate(dataColumnPairDo.getGmtCreate());
          columnPair.setGmtModified(dataColumnPairDo.getGmtModified());
  
          return columnPair;
      }