/**
  * {@inheritDoc}
  */
 public function save(State $state, $sagaId)
 {
     $serializedState = $state->serialize();
     $serializedState['_id'] = $serializedState['id'];
     $serializedState['sagaId'] = $sagaId;
     $serializedState['removed'] = $state->isDone();
     $this->collection->save($serializedState);
 }