CatalogueCacheFactory
class CatalogueCacheFactory implements ConfigCacheFactoryInterface
Hands the translator a cache that knows which translations its catalogue was built from. See {CatalogueCache}.
The revision is resolved lazily, per call: the translator initialises a catalogue the first time one is needed, by which point every extension has registered its translation files — asking any earlier would describe a smaller set than the catalogue is actually built from.