if(opHandlers == null) {
opHandlers = new HashMap<String, OperationCommand>();
}
final OpHandler opHandler = new OpHandler(op);
opHandlers.put(op, opHandler);
opHandler.addArgument(this.headers);
if(descr != null && descr.has(Util.REQUEST_PROPERTIES)) {
final List<Property> propList = descr.get(Util.REQUEST_PROPERTIES).asPropertyList();
for (Property prop : propList) {
final ModelNode propDescr = prop.getValue();