Bug 10236 Enable decorators in Type hierarchy view
See the packages view for how to do this.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
import org.eclipse.jdt.core.IClassFile;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IMember;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.ui.IContextMenuConstants;
import org.eclipse.jdt.ui.ITypeHierarchyViewPart;
import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.actions.AddMethodStubAction;
import org.eclipse.jdt.internal.ui.actions.ContextMenuGroup;
import org.eclipse.jdt.internal.ui.dnd.BasicSelectionTransferDragAdapter;
import org.eclipse.jdt.internal.ui.dnd.LocalSelectionTransfer;
import org.eclipse.jdt.internal.ui.javaeditor.EditorUtility;
import org.eclipse.jdt.internal.ui.packageview.BuildGroup;
import org.eclipse.jdt.internal.ui.preferences.JavaBasePreferencePage;
import org.eclipse.jdt.internal.ui.refactoring.actions.RefactoringGroup;
import org.eclipse.jdt.internal.ui.reorg.ReorgGroup;
import org.eclipse.jdt.internal.ui.util.OpenTypeHierarchyUtil;
import org.eclipse.jdt.internal.ui.viewsupport.ErrorTickImageProvider;
import org.eclipse.jdt.internal.ui.viewsupport.IProblemChangedListener;
import org.eclipse.jdt.internal.ui.viewsupport.JavaElementLabels;
import org.eclipse.jdt.internal.ui.viewsupport.JavaUILabelProvider;
import org.eclipse.jdt.internal.ui.viewsupport.StatusBarUpdater;
/**
 * view showing the supertypes/subtypes of its input.
 */
public class TypeHierarchyViewPart extends ViewPart implements ITypeHierarchyViewPart {