TextFormField

DropdownButtonFormField

AutovalidateMode

Relevant issues:

Issue 56363

Issue 18885

Issue 15404

Issue 36154

Issue 48876

Relevant PRs:

Deprecated in #59766

Removed in #90292

FloatingHeaderSnapConfiguration.vsync

Supported by Flutter Fix: no

The TickerProvider vsync property of FloatingHeaderSnapConfiguration was
deprecated in v1.19.

The vsync for the animation should instead be specified using
SliverPersistentHeaderDelegate.vsync.

Migration guide

Code before migration:

class