App the source belongs to: folder (relative to rootDir, . for the
root) of the nearest tsconfig.app.json above the registration, or
above the file when nothing registers it. . when there is none.
Loaded only under a condition (lookup by a runtime key, or a branch).
OptionalconditionWhy the source is conditional; set when conditional is true.
Keys of the source with their values.
How the source was found.
File holding the keys: the TS file of the object literal, or the JSON file.
OptionalgroupLookup key the source is filed under: beta in { beta: [de, en] }[key].
Whether the keys are a TS object literal or a JSON file.
Language code: the language argument of setTranslation, or the JSON file name without suffix.
OptionalregisteredOutermost call handing the source to setTranslation, or the loader.
A translation file for one language.