code: public void selectValue(String value) {
  
          if (m_selectCells.get(value) == null) {
              return;
          }
  
          updateOpener(value);
          if (m_textMetricsPrefix != null) {
              truncate(m_textMetricsPrefix, m_widgetWidth);
          }
          m_selectedValue = value;
          close();
      }
docs: Helper method to set the current selected option.<p>
  
  This method does not trigger the "value changed" event.<p>
  
  @param value the new value