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/MethodsViewer.java
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.ui.IContextMenuConstants;
import org.eclipse.jdt.internal.corext.util.JavaModelUtil;
import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.JavaPluginImages;
import org.eclipse.jdt.internal.ui.actions.ContextMenuGroup;
import org.eclipse.jdt.internal.ui.actions.GenerateGroup;
import org.eclipse.jdt.internal.ui.actions.OpenJavaElementAction;
import org.eclipse.jdt.internal.ui.search.JavaSearchGroup;
import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
import org.eclipse.jdt.internal.ui.util.SelectionUtil;
import org.eclipse.jdt.internal.ui.viewsupport.ErrorTickImageProvider;
import org.eclipse.jdt.internal.ui.viewsupport.JavaElementLabels;
import org.eclipse.jdt.internal.ui.viewsupport.JavaElementSorter;
import org.eclipse.jdt.internal.ui.viewsupport.JavaUILabelProvider;
import org.eclipse.jdt.internal.ui.viewsupport.ProblemTableViewer;
/**
 * Method viewer shows a list of methods of a input type. 
 * Offers filter actions. 
 * No dependency to the type hierarchy view
 */
public class MethodsViewer extends ProblemTableViewer {