code: public function isAccessible(AcquirerInterface $acquirer, ResourceInterface $resource)
      {
          if (!$resource->isLocked()) {
              return true;
          }
  
          $lock = $resource->getLock();
          if ($lock instanceof ExpiringLockInterface and $this->isLockExpired($lock)) {
              $this->release($lock);
  
              return true;
          }
  
          return $lock->getAcquirer()->getIdentifier() === $acquirer->getIdentifier();
      }
docs: Check whether the given Acquirer may access the Resource in question.
  
  @param AcquirerInterface $acquirer
  @param ResourceInterface $resource
  
  @return bool