private void createTopLevelPageRenderer( UIImpl ui, List<PageDescriptor> pages ) {
for( PageDescriptor descriptor : pages ) {
if( !exist( descriptor ) ) {
RendererFactory rendererFactory = uiDescriptor.getRendererFactory();
PageRenderer renderer = rendererFactory.createPageRenderer( ui, uiRenderer, descriptor, new PageData() );
topLevelPageRenderers.put( descriptor, renderer );
renderer.createControl( pageParent );
}
}
}