private Collection getLayersWithModifiedFeatureCollections() { ArrayList layersWithModifiedFeatureCollections = new ArrayList(); for (Iterator i = getLayerManagers().iterator(); i.hasNext(); ) { LayerManager layerManager = (LayerManager) i.next(); layersWithModifiedFeatureCollections.addAll( layerManager.getLayersWithModifiedFeatureCollections()); } return layersWithModifiedFeatureCollections; }