Bug 137315 [Dialogs] Doubleclickable area to restore dialog size is often very small
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
/**
	 * Returns the button created by the method <code>createButton</code> for
	 * the specified ID as defined on <code>IDialogConstants</code>. If
	 * <code>createButton</code> was never called with this ID, or if
	 * <code>createButton</code> is overridden, this method will return
	 * <code>null</code>.
	 * 
	 * @param id
	 *            the id of the button to look for
	 * 
	 * @return the button for the ID or <code>null</code>
	 * 
	 * @see #createButton(Composite, int, String, boolean)
	 * @since 2.0
	 */
	protected Button getButton(int id) {
		return (Button) buttons.get(new Integer(id));
	}
	/**
	 * Returns the button bar control.
	 * <p>
	 * 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;
	}