Bug 176986 [Markers] Move tasks into the problems view
We should consider moving the tasks into the problem view as currently no one is using them in the tasks view. The main issue this could create is performance - problems change rapidly but tasks are generally pretty static and it may be a fair amount of extra time spent sorting them.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerSupportRegistry.java
*/
	private TableComparator findSorterInChildren(String typeName,
			MarkerType type) {
		MarkerType[] types = type.getAllSubTypes();
		TableComparator defaultSorter = null;
		if (hierarchyOrders.containsKey(type.getId())) {
			defaultSorter = (TableComparator) hierarchyOrders.get(type.getId());
		}
		for (int i = 0; i < types.length; i++) {
			MarkerType[] subtypes = types[i].getAllSubTypes();
			for (int j = 0; j < subtypes.length; j++) {
				TableComparator sorter = findSorterInChildren(typeName,
						subtypes[j]);
				if (sorter != null) {
					return sorter;
				}
			}
		}
		return defaultSorter;
	}
	/**
	 * Return the FieldMarkerGroups in the receiver.
	 * 
	 * @return Collection of {@link MarkerGroup}
	 */
	public Collection getMarkerGroups() {
		return markerGroups.values();
	}
	/**
	 * Return the default groupfield.