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/IWizardPage.java
* <p>
 * This information is typically used by the wizard to decide
 * when it is okay to finish.
 * </p>
 *
 * @return <code>true</code> if this page is complete, and
 *  <code>false</code> otherwise
 */
public boolean isPageComplete();
/**
 * Sets the wizard page that would typically be shown 
 * if the user was to press the Back button.
 * <p>
 * This method is called by the container.
 * </p>
 *
 * @param page the previous wizard page
 */
public void setPreviousPage(IWizardPage page);
/**
 * Sets the wizard that hosts this wizard page.
 * Once established, a page's wizard cannot be changed
 * to a different wizard.
 *
 * @param newWizard the wizard
 * @see #getWizard
 */
public void setWizard(IWizard newWizard);
}