All classes that implement PoMetadataInterface

class \Drupal\Component\Gettext\PoMemoryWriter implements PoWriterInterface
class \Drupal\Component\Gettext\PoStreamReader implements PoReaderInterface, PoStreamInterface
class \Drupal\Component\Gettext\PoStreamWriter implements PoStreamInterface, PoWriterInterface
class \Drupal\locale\PoDatabaseReader implements PoReaderInterface
class \Drupal\locale\PoDatabaseWriter implements PoWriterInterface