Bug 207268 Add visibility option for plot within axes
For chart with axes, we should make plot within axes invisible. Meantime, other plots, such as axes, legend and title, should be visible. This enhancement doesn't include UI change, and it is required for cross tab integration.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/layout/impl/ClientAreaImpl.java
* <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetInsets( Insets newInsets,
			NotificationChain msgs )
	{
		Insets oldInsets = insets;
		insets = newInsets;
		if ( eNotificationRequired( ) )
		{
			ENotificationImpl notification = new ENotificationImpl( this,
					Notification.SET,
					LayoutPackage.CLIENT_AREA__INSETS,
					oldInsets,
					newInsets );
			if ( msgs == null )
				msgs = notification;
			else
				msgs.add( notification );
		}
		return msgs;
	}
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public void setInsets( Insets newInsets )
	{
		if ( newInsets != insets )
		{