Currently showDatePicker only allows users to pick a full date e.g. year, month and day. However, sometimes you want to enforce that users only pick specific sections of date for example just year. I know year picker is available as a widget right now but there is no explanation on how to use this solely in showDatePicker.

I think it would be very useful if we can specify what part of date we want users to pick. Maybe something like

DatePick.year
DatePick.yearAndMonth
DatePick.all

meanwhile, it would be great if anyone could provide example on just using year picker and getting year input only.