docs: public Object getControlValue()
      {
          Container container = this.getParent();
          if (container instanceof JCalendarDualField)
              container = container.getParent();
          if (container instanceof JTable)
          {   // Always
              JTable jtable = (JTable)container;
              int iRow = jtable.getSelectedRow();
              Object value = jtable.getValueAt(iRow, m_iColumn);
              this.setControlValue(value);    // Make sure I have the right value
          }
          Object objReturn = this.getTargetDate();
          if (this.getConverter() instanceof FieldInfo)
          { // Always
              this.getConverter().setData(objReturn);
              objReturn = this.getConverter().getString(); // Convert to a string and fix.
          }
          return objReturn;
      }