12. よく読むとこうだった
/**
* Static method so that client code does not have to create Object Manager Factory
every time Bootstrap is called
*
* @param string $rootDir
* @param array $initParams
* @param ObjectManagerFactory $factory
* @return Bootstrap
*/
public static function create($rootDir, array $initParams, ObjectManagerFactory
$factory = null)
{
self::populateAutoloader($rootDir, $initParams);
if ($factory === null) {
$factory = self::createObjectManagerFactory($rootDir, $initParams);
}
return new self($factory, $rootDir, $initParams);
}