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
while (filtersIterator.hasNext()) {
				MarkerFieldFilterGroup next = (MarkerFieldFilterGroup) filtersIterator
						.next();
				if (next.isEnabled())
					enabledFilters.add(next);
			}
		}
		return enabledFilters;
	}
	/**
	 * Return the generator for the receiver.
	 * 
	 * @return MarkerContentGenerator
	 */
	MarkerContentGenerator getGenerator() {
		return generator;
	}
	/**
	 * Get the raw list of marker entries.
	 * 
	 * @return list of MarkerEntry
	 */
	MarkerEntry[] getMarkerEntries() {
		if (refreshingMarkers())
			return EMPTY_ENTRY_ARRAY;
		return currentMap.toArray();
	}
	/**
	 * Get the MarkerItem that matches marker.
	 *