Make PageView.controller nullable
Summary
#
If a controller isn't provided in the constructor,
the controller member is null. This makes
PageView and its controller property consistent with other widgets.
Migration guide
#Before:
dart
pageView.controller.page
After:
dart
pageView.controller!.page
Timeline
#
Landed in version: 3.19.0-12.0.pre
In stable release: 3.22.0
References
#Relevant issues:
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