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/views/markers/internal/MarkerSupportRegistry.java
for (int j = 0; j < elements.length; j++) {
			IConfigurationElement element = elements[j];
			if (element.getName().equals(PROBLEM_FILTER)) {
				ProblemFilter filter = newFilter(element);
				registeredFilters.put(filter.getId(), filter);
				tracker.registerObject(extension, filter,
						IExtensionTracker.REF_STRONG);
				continue;
			}
			if (element.getName().equals(MARKER_GROUPING)) {
				String id = element
						.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID);
				MarkerGroup group;
				if (id.equals(Util.TYPE_MARKER_GROUPING_ID))
					group = new TypeMarkerGroup(element.getAttribute(LABEL));
				else
					group = new MarkerGroup(element);
				markerGroups.put(group.getId(), group);
				tracker.registerObject(extension, group,
						IExtensionTracker.REF_STRONG);
				continue;
			}
			if (element.getName().equals(MARKER_GROUPING_ENTRY)) {
				MarkerGroupingEntry entry = new MarkerGroupingEntry(element
						.getAttribute(LABEL), element
						.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID),
						(Integer.valueOf(element.getAttribute(PRIORITY))
								.intValue()));
				String groupName = element.getAttribute(MARKER_GROUPING);
				Collection entries;