Bug 223246 [Markers] Rename markerFieldFilterGrouping
markerFieldFilterGrouping is not meaningful name for something that is really a markerFieldConfiguration definition. Added to the fact that we also have markerGroupings this is very confusing.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerContentGenerator.java
private static final String MARKER_FIELD_REFERENCE = "markerFieldReference"; 
	private MarkerField[] allFields;
	private IConfigurationElement configurationElement;
	private Collection markerTypes;
	private MarkerField[] initialVisible;
	private Collection groups;
	private Collection generatorExtensions = new ArrayList();
	private Map allTypesTable;
	/**
	 * Create a new MarkerContentGenerator
	 * 
	 * @param element
	 */
	public MarkerContentGenerator(IConfigurationElement element) {
		configurationElement = element;
	}
	/**
	 * Add the groups defined in the receiver to the collection of groups.
	 * 
	 * @param groups
	 */
	private void addDefinedGroups(Collection groups) {
		
		addGroupsFrom(configurationElement, groups);
		
		Iterator extensions = generatorExtensions.iterator();
		while (extensions.hasNext()) {
			addGroupsFrom((IConfigurationElement) extensions.next(), groups);
		}
	}