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/MarkerGroupingEntry.java
* Set the group for the receiver.
	 * @param group
	 */
	public void setGroup(MarkerGroup group) {
		markerGroup = group;
		
	}
	/**
	 * Get the label of the receiver.
	 * @return String
	 */
	public String getLabel() {
		return label;
	}
	/**
	 * Return the priority of the receiver.
	 * @return int
	 */
	public int getPriority() {
		return sortPriority;
	}
	/**
	 * Return the marker group for the receiver.
	 * @return FieldMarkerGroup
	 */
	public MarkerGroup getMarkerGroup() {
		return markerGroup;
	}
}