docs: public static ColumnIO lookupColumnByName(GroupColumnIO groupColumnIO, String columnName)
      {
          ColumnIO columnIO = groupColumnIO.getChild(columnName);
  
          if (columnIO != null) {
              return columnIO;
          }
  
          for (int i = 0; i < groupColumnIO.getChildrenCount(); i++) {
              if (groupColumnIO.getChild(i).getName().equalsIgnoreCase(columnName)) {
                  return groupColumnIO.getChild(i);
              }
          }
  
          return null;
      }