In some rare cases the data provided by the developer will require some additional formatting before it can be placed into the string.
L20n provides a list of built-in functions that can help with common operations on the external arguments.
By default, L20n can guess which formatter to run on each kind of
but you can also call the builtin explicitly.
Explicit calls are useful because they allow you to pass additional
formatting options that may help make the formatted string look better in
the given language. Examples may be defining month as
DATE formatter (using arguments
defined in Intl.DateTimeFormat) or whether to use
grouping separator when displaying a large number.