addFallbackCatalogue(

string transChoice(string $id, int $number, array $parameters = array(), string|null $domain = null, string|null $locale = null)

class PoFileLoader extends

replace(array $messages, string $domain = 'messages') Sets translations for a given domain.

MessageCatalogueInterface|null

addExtractor(string $format,

setFallbackLocales(array $locales) Sets the fallback locales.

class ChainExtractor implements

string transChoice(string $id, int $number, array $parameters = array(), string|null $domain = null, string|null $locale = null)

array getNewMessages(string $domain) Returns new messages ('new') after operation.