Bug 242427 [Commands] IAction.AS_RADIO_BUTTON actions contributed with ActionContributionItem to MenuManager have problems getting checked on selection
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ActionContributionItem.java
ti = new ToolItem(parent, flags, index);
			} else {
				ti = new ToolItem(parent, flags);
			}
			ti.setData(this);
			ti.addListener(SWT.Selection, getToolItemListener());
			ti.addListener(SWT.Dispose, getToolItemListener());
			widget = ti;
			update(null);
			
			action.addPropertyChangeListener(propertyListener);
			if (action != null) {
				String commandId = action.getActionDefinitionId();
				ExternalActionManager.ICallback callback = ExternalActionManager
						.getInstance().getCallback();
				if ((callback != null) && (commandId != null)) {
					callback.addPropertyChangeListener(commandId,
							actionTextListener);
				}
			}
		}
	}
	/**
	 * Returns the action associated with this contribution item.
	 * 
	 * @return the action
	 */
	public IAction getAction() {
		return action;
	}