All classes that implement PoMetadataInterface in Drupal 9
- 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