Bug 29163 SafeRunnable needs to be accessible in JFace
We need to be able to access the SafeRunnable in JFace in order that some error protection can be added to preferences and properties dialogs.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/wizard/Wizard.java
/**
 * Controls whether the wizard needs Previous and Next 
 * buttons even if it currently contains only one page.
 * <p>
 * This flag should be set on wizards where the first wizard page
 * adds follow-on wizard pages based on user input.
 * </p>
 *
 * @param b <code>true</code> to always show Next and Previous
 *   buttons, and <code>false</code> to suppress Next and Previous
 *   buttons for single page wizards
 */
public void setForcePreviousAndNextButtons(boolean b) {
	forcePreviousAndNextButtons = b;
}
/**
 * Sets whether help is available for this wizard.
 * <p>
 * The result of this method is typically used by the container to
 * show or hide the Help button.
 * </p>
 *
 * @param b <code>true</code> if help is available,
 *   and <code>false</code> if this wizard is helpless
 * @see #isHelpAvailable
 */
public void setHelpAvailable(boolean b) {
	isHelpAvailable = b;
}
/**