code: private void overAttributeChoice(CmsAttributeChoiceWidget choice) {
  
          cancelChoiceTimer();
          if (choice.getParent() != m_buttonBar) {
              closeAll();
              m_buttonBar = choice.getParent();
              setButtonBarVisibility(m_buttonBar, true);
          }
          if (m_choice != choice) {
              closeAllChoices();
              m_choice = choice;
              m_choice.show();
          }
      }
docs: Handles the mouse over event for a choice widget.<p>
  
  @param choice the event source