No named parameter with the name 'shadowThemeOnly'.

[him123]

../../flutter/.pub-cache/git/flutter-cupertino-date-picker-3a6b1513d77636976794b6c64630b7ae219fb371/lib/src/date_picker.dart:103:34: Error: No named parameter with the name 'shadowThemeOnly'.
theme: Theme.of(context, shadowThemeOnly: true),
^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/theme.dart:107:20: Context: Found this candidate, but the arguments don't match.

static ThemeData of(BuildContext context) {
^^

FAILURE: Build failed with an exception.

[him123]

Making date picker for only days like below, it show only 30 days in the picker, when we show days it should show 31 days in the picker.

DatePicker.showDatePicker(context, dateFormat: 'dd',
        onChange: (date, u) {
        }

[sgelves]

You should've migrate to flutter_cupertino_datetime_picker. That solved the problem to me, I found the solution in another thread #152.