Bug 132821 [Dialogs] Stored Dialog location and size invalid after changing font
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
* Clients may call this framework method, but should not override it.
	 * </p>
	 * 
	 * @return the button bar, or <code>null</code> if the button bar has not
	 *         been created yet
	 */
	protected Control getButtonBar() {
		return buttonBar;
	}
	/**
	 * Returns the button created when <code>createButton</code> is called
	 * with an ID of <code>IDialogConstants.CANCEL_ID</code>. If
	 * <code>createButton</code> was never called with this parameter, or if
	 * <code>createButton</code> is overridden, <code>getCancelButton</code>
	 * will return <code>null</code>.
	 * 
	 * @return the cancel button or <code>null</code>
	 * 
	 * @see #createButton(Composite, int, String, boolean)
	 * @since 2.0
	 * @deprecated Use <code>getButton(IDialogConstants.CANCEL_ID)</code>
	 *             instead. This method will be removed soon.
	 */
	protected Button getCancelButton() {
		return getButton(IDialogConstants.CANCEL_ID);
	}
	/**
	 * Returns the dialog area control.
	 * <p>
	 * Clients may call this framework method, but should not override it.