Bug 301976 [WorkingSets] Test failure on Cocoa, N20100204-2000
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceWorkingSetPage.java
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.IWorkingSetManager;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.IWorkingSetPage;
import org.eclipse.ui.internal.ide.IDEInternalWorkbenchImages;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
import org.eclipse.ui.model.WorkbenchContentProvider;
import org.eclipse.ui.model.WorkbenchLabelProvider;
/**
 * A resource working set page allows the user to edit an 
 * existing working set and create a new working set.
 * <p>
 * Working set elements are presented as a simple resource tree.
 * </p>
 * 
 * @since 2.0
 */
public class ResourceWorkingSetPage extends WizardPage implements
        IWorkingSetPage {
    private final static int SIZING_SELECTION_WIDGET_WIDTH = 50;
    private final static int SIZING_SELECTION_WIDGET_HEIGHT = 200;
    private Text text;
    private CheckboxTreeViewer tree;
    private IWorkingSet workingSet;
    /**