public Column findColumn(String name, boolean caseSensitive)
public Column findColumn(String name)
    public Column findColumn(String name, boolean caseSensitive)    {        for (Iterator it = _columns.iterator(); it.hasNext(); )        {            Column column = (Column)it.next();            if (caseSensitive)            {                if (column.getName().equals(name))                {                    return column;                }            }            else            {                if (column.getName().equalsIgnoreCase(name))                {                    return column;                }            }        }        return null;    }