constants library Null safety

Constants

kDateDisplayFormat → const String
'dd/MM/yyyy'
kDefaultDateTimeFormat → const String
'yyyy-MM-dd HH:mm:ss'
kFullDateDisplayFormat → const String
'dd MMMM, yyyy'
kFullMonthYearFormat → const String
'MMMM-yyyy'
kInternetNotAvailable → const String
'Internet Connection not Available.'
kNo → const String
'No'
kOK → const String
'OK'
kTimeDisplayFormat → const String
'hh:mm a'
kYes → const String
'Yes'