Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonViewer.java
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Widget;
import org.eclipse.ui.internal.navigator.CommonNavigatorFrameSource;
import org.eclipse.ui.internal.navigator.ContributorTrackingSet;
import org.eclipse.ui.internal.navigator.NavigatorContentService;
import org.eclipse.ui.internal.navigator.NavigatorDecoratingLabelProvider;
import org.eclipse.ui.internal.navigator.NavigatorPipelineService;
import org.eclipse.ui.internal.navigator.dnd.NavigatorDnDService;
import org.eclipse.ui.internal.navigator.framelist.FrameList;
/**
 * 
 * Provides the Tree Viewer for the Common Navigator. Content and labels are
 * provided by an instance of {@link INavigatorContentService}&nbsp; which uses
 * the ID supplied in the constructor
 * {@link CommonViewer#CommonViewer(String, Composite, int)} or through
 * {@link NavigatorContentServiceFactory#createContentService(String, org.eclipse.jface.viewers.StructuredViewer)}.
 * 
 * <p>
 * Clients may extend this class.
 * </p>
 * 
 * <p>
 * Note that as of 3.2.1 and 3.3, the common viewer caches its selection.
 * Clients must not set the selection of the viewer's tree control directly.
 * </p>
 * 
 * @since 3.2
 */
public class CommonViewer extends TreeViewer {