+// public void addLayer(SuiteLayer layer, Map<String, Object> properties) {
+// if (!properties.containsKey(Constants.SERVICE_PID))
+// throw new IllegalArgumentException("A layer must have an ID");
+// String pid = (String) properties.get(Constants.SERVICE_PID);
+// List<String> types = properties.containsKey(EntityConstants.TYPE)
+// ? LangUtils.toStringList(properties.get(EntityConstants.TYPE))
+// : new ArrayList<>();
+// if (types.isEmpty()) {
+// RankedObject.putIfHigherRank(layersByPid, pid, layer, properties);
+// } else {
+// if (layersByPid.containsKey(pid)) {
+// RankedObject<SuiteLayer> current = layersByPid.get(pid);
+// List<String> currentTypes = current.getProperties().containsKey(EntityConstants.TYPE)
+// ? LangUtils.toStringList(current.getProperties().get(EntityConstants.TYPE))
+// : new ArrayList<>();
+// if (!types.containsAll(currentTypes)) {
+// throw new IllegalArgumentException("Higher-ranked layer " + pid + " contains only types " + types
+// + ", while it must override all " + currentTypes);
+// }
+// }
+// RankedObject.putIfHigherRank(layersByPid, pid, layer, properties);
+// for (String type : types)
+// RankedObject.putIfHigherRank(layersByType, type, layer, properties);
+// }
+// }
+