dateMask property
For forms that match one of our predefined skeletons, we look up the
corresponding pattern in locale (or in the default locale if none is
specified) and use the resulting full format string. This is the
preferred usage, but if newPattern does not match one of the skeletons,
then it is used as a format directly, but will not be adapted to suit the
locale.
Implementation
final String? dateMask;