Bug 215004 [Markers] New Problems view: 'Group by > Type' broken
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerGroup.java
String attribute;
		String attributeValue;
		AttributeMarkerGrouping grouping;
		/**
		 * Create a mapping for an attribute with name attributeName and value
		 * value to the supplied entry.
		 * 
		 * @param entry
		 * @param attributeName
		 * @param value
		 */
		AttributeMapping(MarkerGroupingEntry entry, String attributeName,
				String value, AttributeMarkerGrouping grouping) {
			super(entry);
			attribute = attributeName;
			attributeValue = value;
			this.grouping = grouping;
		}
		/*