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
else if (input instanceof IFileEditorInput)
			return ((IFileEditorInput)input).getFile();
		else if (input instanceof JarEntryEditorInput)
			return ((JarEntryEditorInput)input).getStorage();
		return null;
	}
	
	/**
 	 * Returns the Viewer.
 	 */
	TreeViewer getViewer() {
		return fViewer;
	}
	
	/**
 	 * Returns the pattern filter for this view.
 	 * @return the pattern filter
 	 */
	JavaElementPatternFilter getPatternFilter() {
		return fPatternFilter;
	}
	
	/**
 	 * Returns the library filter for this view.
 	 * @return the library filter
 	 */
	LibraryFilter getLibraryFilter() {
		return fLibraryFilter;
	}
	/**