Message/plural format library with locale support. This can have different implementations based on the mechanism for finding the localized versions of messages. This version expects them to be in a library named e.g. 'messages_en_US'. The prefix is set in the "initializeMessages" call, which must be made for a locale before any lookups can be done.
See Intl class comment or
tests/message_format_test.dart for more examples.
This is a message lookup mechanism that delegates to one of a collection of individual MessageLookupByLibrary instances.
This provides an abstract class for messages looked up in generated code. Each locale will have a separate subclass of this class with its set of messages. See generate_localized.dart.