Bug 293787 Markers view not filtering by workingsets
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerContentGenerator.java
import org.eclipse.ui.WorkbenchException;
import org.eclipse.ui.XMLMemento;
import org.eclipse.ui.internal.ide.IDEInternalPreferences;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
import org.eclipse.ui.internal.ide.Policy;
import org.eclipse.ui.statushandlers.StatusManager;
import org.eclipse.ui.views.markers.FilterConfigurationArea;
import org.eclipse.ui.views.markers.MarkerField;
import org.eclipse.ui.views.markers.internal.ContentGeneratorDescriptor;
import org.eclipse.ui.views.markers.internal.MarkerGroup;
import org.eclipse.ui.views.markers.internal.MarkerSupportRegistry;
import org.eclipse.ui.views.markers.internal.MarkerType;
import org.eclipse.ui.views.markers.internal.MarkerTypesModel;
import org.eclipse.ui.views.markers.internal.ProblemFilter;
import org.eclipse.ui.views.markers.internal.Util;
/**
 * MarkerContentGenerator is the representation of the markerContentGenerator
 * extension point.
 * 
 * @since 3.4
 * 
 */
public class MarkerContentGenerator {
	/**
	 * The IMemeto Tags
	 */
	private static final String TAG_COLUMN_VISIBILITY = "visible"; 
	private static final String TAG_FILTERS_SECTION = "filterGroups"; 
	private static final String TAG_GROUP_ENTRY = "filterGroup"; 
	private static final String TAG_AND = "andFilters";