Bug 214649 [Markers] Allow markerAttributeGroupings and markerGroups to be specified within contentGenerators
With everything at the top level it is hard to see the relation to a contentGenerator and the groups and attribute groupings. These should be sub elements a la menus.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/CachedMarkerBuilder.java
} catch (WorkbenchException e) {
			StatusManager.getManager().handle(e.getStatus());
			return;
		}
	}
	/**
	 * Restore the pre-3.4 filters.
	 * 
	 * @param memento
	 */
	private void restoreLegacyFilters(IMemento memento) {
		IMemento[] sections = null;
		if (memento != null)
			sections = memento.getChildren(TAG_LEGACY_FILTER_ENTRY);
		for (int i = 0; i < sections.length; i++) {
			IMemento child = sections[i];
			String id = child.getString(IMemento.TAG_ID);
			if (id == null)
				continue;
			loadLegacyFilter(child);
		}
	}
	/**
	 * Load the legacy filter into the system.
	 * 
	 * @param child
	 */
	private void loadLegacyFilter(IMemento child) {
		MarkerFieldFilterGroup newGroup = new MarkerFieldFilterGroup(null, this);
		newGroup.legacyLoadSettings(child);