protected function setupRepositoryLoader(array $repositories)
{
$map = [];
foreach ($repositories as $name => $className) {
$map[$className] = $this->prefix('repositories.' . $name);
}
$builder = $this->getContainerBuilder();
$builder->addDefinition($this->prefix('repositoryLoader'))->setClass(RepositoryLoader::class)->setArguments(['repositoryNamesMap' => $map]);
}