Note: This is not a real constructor, but just a description of the type of object that should be passed as
a parameter to some method(s), and/or the return value from some method(s).
In other words, the type exists only for documentation purposes, and you cannot call new locale.__FormatOptions()
See the dojo/date/locale.__FormatOptions reference documentation for more information.
choice of long, short, medium or full (plus any custom additions). Defaults to 'short'
(format only) use 4 digit years whenever 2 digit years are called for