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/MarkerContentGenerator.java
NLS
												.bind(
														MarkerMessages.ContentGenerator_NoGrouping,
														new Object[] {
																children[i]
																		.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID),
																configurationElement
																		.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID) })),
								StatusManager.LOG);
			} else
				groups.add(group);
		}
	}
	/**
	 * Compute all of the markers for the receiver's type.
	 * 
	 * @param subMonitor
	 * @return MarkerEntry
	 */
	private Collection computeAllMarkers(SubProgressMonitor subMonitor) {
		Collection allMarkers = new HashSet();
		findMarkers(allMarkers, new IResource[] { ResourcesPlugin
				.getWorkspace().getRoot() }, null, IResource.DEPTH_INFINITE,
				subMonitor);
		return allMarkers;
	}
	/**
	 * Compute the marker for the supplied filter and add to return markers.
	 * 
	 * @param returnMarkers