Bug 108493 [Markers] Show tooltips for table columns in marker views
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ExtendedMarkersView.java
import org.eclipse.ui.internal.provisional.views.markers.api.MarkerField;
import org.eclipse.ui.internal.provisional.views.markers.api.MarkerItem;
import org.eclipse.ui.internal.provisional.views.markers.api.MarkerSupportConstants;
import org.eclipse.ui.menus.IMenuService;
import org.eclipse.ui.part.ViewPart;
import org.eclipse.ui.progress.IWorkbenchSiteProgressService;
import org.eclipse.ui.progress.WorkbenchJob;
import org.eclipse.ui.statushandlers.StatusManager;
import org.eclipse.ui.views.markers.internal.MarkerGroup;
import org.eclipse.ui.views.markers.internal.MarkerMessages;
import org.eclipse.ui.views.markers.internal.MarkerSupportRegistry;
import org.eclipse.ui.views.tasklist.ITaskListResourceAdapter;
/**
 * The ExtendedMarkersView is the view that shows markers using the
 * markerGenerators extension point.
 * 
 * @since 3.4
 * 
 */
public class ExtendedMarkersView extends ViewPart {
	/**
	 * MarkerSelectionEntry is a cache of the values for a marker entry.
	 * 
	 * @since 3.4
	 * 
	 */
	final class MarkerSelectionEntry {
		Object[] cachedValues;
		MarkerSelectionEntry(MarkerItem item) {
			MarkerField[] fields = builder.getGenerator().getVisibleFields();