LoaderInterface

class \Drupal\Core\Template\Loader\ComponentLoader implements \Twig\Loader\LoaderInterface
class \Drupal\Core\Template\Loader\FilesystemLoader extends \Twig\Loader\FilesystemLoader
class \Drupal\Core\Template\Loader\StringLoader implements \Twig\Loader\LoaderInterface
class \Drupal\Core\Template\Loader\ThemeRegistryLoader extends \Twig\Loader\FilesystemLoader
class \Drupal\help\HelpTopicTwigLoader extends \Twig\Loader\FilesystemLoader
class \Twig\Loader\ArrayLoader implements \Twig\Loader\LoaderInterface
class \Twig\Loader\ChainLoader implements \Twig\Loader\LoaderInterface
class \Twig\Loader\FilesystemLoader implements \Twig\Loader\LoaderInterface