gt: 		if (error == null && throwable != null) {
context: /*
   * 
   */
  package swml.diagram.part;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.eclipse.core.runtime.IPath;
  import org.eclipse.core.runtime.IStatus;
  import org.eclipse.core.runtime.Path;
  import org.eclipse.core.runtime.Platform;
  import org.eclipse.core.runtime.Status;
  import org.eclipse.emf.common.notify.AdapterFactory;
  import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
  import org.eclipse.emf.edit.provider.IItemLabelProvider;
  import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory;
  import org.eclipse.emf.edit.provider.resource.ResourceItemProviderAdapterFactory;
  import org.eclipse.emf.edit.ui.provider.ExtendedImageRegistry;
  import org.eclipse.gmf.runtime.diagram.core.preferences.PreferencesHint;
  import org.eclipse.jface.resource.ImageDescriptor;
  import org.eclipse.swt.graphics.Image;
  import org.eclipse.ui.plugin.AbstractUIPlugin;
  import org.osgi.framework.BundleContext;
  
  import swml.diagram.edit.policies.SwmlBaseItemSemanticEditPolicy;
  import swml.diagram.providers.ElementInitializers;
  import swml.provider.SwmlItemProviderAdapterFactory;
  
  /**
   * @generated
   */
  public class SwmlDiagramEditorPlugin extends AbstractUIPlugin {
  
  	/**
  	 * @generated
  	 */
  	public static final String ID = "mdse.book.swml.diagram"; //$NON-NLS-1$
  
  	/**
  	 * @generated
  	 */
  	public static final PreferencesHint DIAGRAM_PREFERENCES_HINT = new PreferencesHint(
  			ID);
  
  	/**
  	 * @generated
  	 */
  	private static SwmlDiagramEditorPlugin instance;
  
  	/**
  	 * @generated
  	 */
  	private ComposedAdapterFactory adapterFactory;
  
  	/**
  	 * @generated
  	 */
  	private SwmlDocumentProvider documentProvider;
  
  	/**
  	 * @generated
  	 */
  	private SwmlBaseItemSemanticEditPolicy.LinkConstraints linkConstraints;
  
  	/**
  	 * @generated
  	 */
  	private ElementInitializers initializers;
  
  	/**
  	 * @generated
  	 */
  	public SwmlDiagramEditorPlugin() {
  	}
  
  	/**
  	 * @generated
  	 */
  	public void start(BundleContext context) throws Exception {
  		super.start(context);
  		instance = this;
  		PreferencesHint.registerPreferenceStore(DIAGRAM_PREFERENCES_HINT,
  				getPreferenceStore());
  		adapterFactory = createAdapterFactory();
  	}
  
  	/**
  	 * @generated
  	 */
  	public void stop(BundleContext context) throws Exception {
  		adapterFactory.dispose();
  		adapterFactory = null;
  		linkConstraints = null;
  		initializers = null;
  		instance = null;
  		super.stop(context);
  	}
  
  	/**
  	 * @generated
  	 */
  	public static SwmlDiagramEditorPlugin getInstance() {
  		return instance;
  	}
  
  	/**
  	 * @generated
  	 */
  	protected ComposedAdapterFactory createAdapterFactory() {
  		ArrayList<AdapterFactory> factories = new ArrayList<AdapterFactory>();
  		fillItemProviderFactories(factories);
  		return new ComposedAdapterFactory(factories);
  	}
  
  	/**
  	 * @generated
  	 */
  	protected void fillItemProviderFactories(List<AdapterFactory> factories) {
  		factories.add(new SwmlItemProviderAdapterFactory());
  		factories.add(new ResourceItemProviderAdapterFactory());
  		factories.add(new ReflectiveItemProviderAdapterFactory());
  	}
  
  	/**
  	 * @generated
  	 */
  	public AdapterFactory getItemProvidersAdapterFactory() {
  		return adapterFactory;
  	}
  
  	/**
  	 * @generated
  	 */
  	public ImageDescriptor getItemImageDescriptor(Object item) {
  		IItemLabelProvider labelProvider = (IItemLabelProvider) adapterFactory
  				.adapt(item, IItemLabelProvider.class);
  		if (labelProvider != null) {
  			return ExtendedImageRegistry.getInstance().getImageDescriptor(
  					labelProvider.getImage(item));
  		}
  		return null;
  	}
  
  	/**
  	 * Returns an image descriptor for the image file at the given
  	 * plug-in relative path.
  	 *
  	 * @generated
  	 * @param path the path
  	 * @return the image descriptor
  	 */
  	public static ImageDescriptor getBundledImageDescriptor(String path) {
  		return AbstractUIPlugin.imageDescriptorFromPlugin(ID, path);
  	}
  
  	/**
  	 * Respects images residing in any plug-in. If path is relative,
  	 * then this bundle is looked up for the image, otherwise, for absolute 
  	 * path, first segment is taken as id of plug-in with image
  	 *
  	 * @generated
  	 * @param path the path to image, either absolute (with plug-in id as first segment), or relative for bundled images
  	 * @return the image descriptor
  	 */
  	public static ImageDescriptor findImageDescriptor(String path) {
  		final IPath p = new Path(path);
  		if (p.isAbsolute() && p.segmentCount() > 1) {
  			return AbstractUIPlugin.imageDescriptorFromPlugin(p.segment(0), p
  					.removeFirstSegments(1).makeAbsolute().toString());
  		} else {
  			return getBundledImageDescriptor(p.makeAbsolute().toString());
  		}
  	}
  
  	/**
  	 * Returns an image for the image file at the given plug-in relative path.
  	 * Client do not need to dispose this image. Images will be disposed automatically.
  	 *
  	 * @generated
  	 * @param path the path
  	 * @return image instance
  	 */
  	public Image getBundledImage(String path) {
  		Image image = getImageRegistry().get(path);
  		if (image == null) {
  			getImageRegistry().put(path, getBundledImageDescriptor(path));
  			image = getImageRegistry().get(path);
  		}
  		return image;
  	}
  
  	/**
  	 * Returns string from plug-in's resource bundle
  	 *
  	 * @generated
  	 */
  	public static String getString(String key) {
  		return Platform.getResourceString(getInstance().getBundle(), "%" + key); //$NON-NLS-1$
  	}
  
  	/**
  	 * @generated
  	 */
  	public SwmlDocumentProvider getDocumentProvider() {
  		if (documentProvider == null) {
  			documentProvider = new SwmlDocumentProvider();
  		}
  		return documentProvider;
  	}
  
  	/**
  	 * @generated
  	 */
  	public SwmlBaseItemSemanticEditPolicy.LinkConstraints getLinkConstraints() {
  		return linkConstraints;
  	}
  
  	/**
  	 * @generated
  	 */
  	public void setLinkConstraints(
  			SwmlBaseItemSemanticEditPolicy.LinkConstraints lc) {
  		this.linkConstraints = lc;
  	}
  
  	/**
  	 * @generated
  	 */
  	public ElementInitializers getElementInitializers() {
  		return initializers;
  	}
  
  	/**
  	 * @generated
  	 */
  	public void setElementInitializers(ElementInitializers i) {
  		this.initializers = i;
  	}
  
  	/**
  	 * @generated
  	 */
  	public void logError(String error) {
  		logError(error, null);
  	}
  
  	/**
  	 * @generated
  	 */
  	public void logError(String error, Throwable throwable) {
  