onDispatch($evt) {
  $controller = $evt->getRouteMatch()->getParam('controller');

  $serializationGroupsForController = $this->getGroupsForController($controller);

  $serializationGroupOptions = $zendRestOptions->getSerializationGroups();
  $serializationGroupOptions->add
}

getGroupsForController($controller) {
  $reader->...
}