Bug 88352 Operation supports leaks contexts via action handler
I20050315-1100 Susan, this is a different leak from the one that I reported. Test Case: 1. open text editor 2. close text editor ==> DefaultUndoManager is leaked due to undo/redo actions handlers still holding on to the context.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/ResourceNavigator.java
return ResourcesPlugin.getWorkspace().getRoot();
    }
    /**
     * Returns the pattern filter for this view.
     *
     * @return the pattern filter
     * @since 2.0
     */
    public ResourcePatternFilter getPatternFilter() {
        return this.patternFilter;
    }
    /**
     * Returns the working set for this view.
     *
     * @return the working set
     * @since 2.0
     */
    public IWorkingSet getWorkingSet() {
        return workingSetFilter.getWorkingSet();
    }
    /**
     * Returns the navigator's plugin.
     */
    public AbstractUIPlugin getPlugin() {
        return (AbstractUIPlugin) Platform
                .getPlugin(IDEWorkbenchPlugin.IDE_WORKBENCH);
    }
    /**
     * Returns the sorter.
     * @since 2.0