creator.getLayers().add(layer);
layer = MapTests.createLayer(null, BadRenderMetricsFactory.CAN_ADD_LAYER_EXCEPTION, layer.getMapInternal());
layer.setName("layer2"); //$NON-NLS-1$
creator.getLayers().add(layer);
creator.reset();
configuration = creator.getConfiguration();
assertEquals(2, configuration.size());
Iterator<RenderContext> iter = configuration.iterator();
assertFalse( creator.getRenderer(iter.next()) instanceof PlaceHolder );