public function getExpectedGraphResult($cypher, Client $client)
 {
     $transaction = $client->createTransaction();
     $transaction->pushQuery('MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE r,n');
     $transaction->pushQuery($cypher);
     $expectedResult = $transaction->pushQuery('MATCH (n) OPTIONAL MATCH (n)-[r]-() RETURN n,r');
     $transaction->rollback();
     return $expectedResult;
 }