Bug 283555 [Markers] Configure Contents dialog: Types section should not have columns
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/TypesConfigurationArea.java
*/
		public abstract Collection getChildren();
		/**
		 * Return the label for the receiver.
		 * 
		 * @return String
		 */
		public abstract String getLabel();
		/**
		 * Return the parent of the receiver.
		 * 
		 * @return TypesEntry
		 */
		public abstract TypesEntry getParent();
		/**
		 * Return whether or not the receiver has children.
		 * 
		 * @return boolean
		 */
		public abstract boolean hasChildren();
	}
	private static Collection EMPTY_COLLECTION = new HashSet();
	private HashMap models = new HashMap(0);
	private CheckboxTreeViewer typesViewer;
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.FilterConfigurationArea#apply(org.eclipse.ui.internal.provisional.views.markers.api.MarkerFieldFilter)
	 */
	public void apply(MarkerFieldFilter filter) {