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/WizardPage.java
IWizardContainer container = getContainer();
	if(container == null)
		return null;
		
	
	return container.getShell();
}
/* (non-Javadoc)
 * Method declared on IWizardPage.
 */
public IWizard getWizard() {
	return wizard;
}
/**
 * Returns whether this page is the current one in the wizard's container.
 *
 * @return <code>true</code> if the page is active,
 *  and <code>false</code> otherwise
 */
protected boolean isCurrentPage() {
	return (getContainer() != null && this == getContainer().getCurrentPage());
}
/**
 * The <code>WizardPage</code> implementation of this <code>IWizard</code> method 
 * returns the value of an internal state variable set by
 * <code>setPageComplete</code>. Subclasses may extend.
 */
public boolean isPageComplete() {
	return isPageComplete;