code: public Convert getFieldInfo(int iColumnIndex)
      {
          Converter converter = m_table.getRecord().getField(iColumnIndex);
          if (converter != null)
              converter = converter.getFieldConverter();  // Make sure you have the front converter.
          return converter;
      }
docs: Returns the field at columnIndex.
  This should be overidden if don't want to just return the corresponding field in the record.
  @param iColumn The column to get the field from.
  @return The field in this column.