Bug 213014 [Markers] New view doesn't rank fatal errors first any longer when sorting per Java type
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerGroup.java
MarkerGroupingEntry groupingEntry = markerGroup
						.getMapping((ConcreteMarker) node);
				return groupingEntry.getLabel();
			}
			return node.getDescription();
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.ui.views.markers.internal.IField#isShowing()
		 */
		public boolean isShowing() {
			return this.showing;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.ui.views.markers.internal.IField#setShowing(boolean)
		 */
		public void setShowing(boolean showing) {
			this.showing = showing;
		}
	}
	/**
	 * GroupMarkerField is the MarkerField used for MarkerGroupungs
	 * 
	 * @since 3.4
	 * 
	 */
	class GroupMarkerField extends MarkerField {