Puli\Manager\Api\Repository\PathMapping::isLoaded PHP Method

    public function isLoaded()
    {
        return null !== $this->state;
    }

 /**
  * {@inheritdoc}
  */
 public function rollback()
 {
     if (!$this->mapping->isLoaded()) {
         return;
     }
     $packageName = $this->containingPackage->getName();
     $this->mappings->remove($this->mapping->getRepositoryPath(), $packageName);
     foreach ($this->mapping->listRepositoryPaths() as $repositoryPath) {
         $this->mappingsByResource->remove($repositoryPath, $packageName);
         $this->conflictDetector->release($repositoryPath, $packageName);
     }
     // Unload after iterating, otherwise the paths are gone
     $this->mapping->unload();
 }