Bug 11109 F1 no longer works in Packages view
new context ID?
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IPartListener;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.actions.NewWizardMenu;
import org.eclipse.ui.actions.OpenPerspectiveMenu;
import org.eclipse.ui.actions.OpenWithMenu;
import org.eclipse.ui.actions.RefreshAction;
import org.eclipse.ui.dialogs.PropertyDialogAction;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.ui.part.ISetSelectionTarget;
import org.eclipse.ui.part.ResourceTransfer;
import org.eclipse.ui.part.ViewPart;
import org.eclipse.ui.views.internal.framelist.BackAction;
import org.eclipse.ui.views.internal.framelist.ForwardAction;
import org.eclipse.ui.views.internal.framelist.FrameList;
import org.eclipse.ui.views.internal.framelist.GoIntoAction;
import org.eclipse.ui.views.internal.framelist.UpAction;
import org.eclipse.search.ui.IWorkingSet;
import org.eclipse.search.ui.SearchUI;
import org.eclipse.jdt.core.IClassFile;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaModel;