Bug 186808 [JFace] regression: JFace standalone apps should work without org.eclipse.osgi
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/JFaceResources.java
* <pre>
	 * JFaceResources.getImageRegistry().get(key)
	 * </pre>
	 * 
	 * @param key
	 *            the key
	 * @return the image, or <code>null</code> if none
	 */
	public static Image getImage(String key) {
		return getImageRegistry().get(key);
	}
	/**
	 * Returns the image registry for JFace itself.
	 * <p>
	 * Note that the static convenience method <code>getImage</code> is also
	 * provided on this class.
	 * </p>
	 * 
	 * @return the JFace image registry
	 */
	public static ImageRegistry getImageRegistry() {
		if (imageRegistry == null) {
			imageRegistry = new ImageRegistry(
					getResources(Display.getCurrent()));
			initializeDefaultImages();
		}
		return imageRegistry;
	}
	/**
	 * Initialize default images in JFace's image registry.