public function isSpecifiedBy(Account $account)
 {
     return $account->getAmount() >= 0;
 }
 public function isSpecifiedBy(Account $account)
 {
     $userSpec = new NewUserSpecification();
     $accountSpec = new PositiveAccountSpecification();
     return $userSpec->isSpecifiedBy($account->getUser()) && $accountSpec->isSpecifiedBy($account);
 }