Bug 221521 [Markers] New markers API needs to be pared down
We have too much API in some of the new classes and they can be moved to internals
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
* @return MarkerField[]
	 */
	MarkerField[] getVisibleFields() {
		return builder.getVisibleFields();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.part.ViewPart#init(org.eclipse.ui.IViewSite,
	 *      org.eclipse.ui.IMemento)
	 */
	public void init(IViewSite site, IMemento memento) throws PartInitException {
		super.init(site, memento);
		MarkerContentGenerator generator = null;
		if (memento != null) {
			generator = MarkerSupportRegistry.getInstance().getGenerator(
					memento.getString(TAG_GENERATOR));
		}
		if (generator == null && defaultGeneratorIds.length > 0) {
			generator = MarkerSupportRegistry.getInstance().getGenerator(
					defaultGeneratorIds[0]);
			if (generator == null)
				logInvalidGenerator(defaultGeneratorIds[0]);
		}
		if (generator == null)
			generator = MarkerSupportRegistry.getInstance()
					.getDefaultGenerator();
		
		IMenuService menuService = (IMenuService) site
				.getService(IMenuService.class);