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Dart 2021-11-20 16:48:16
The method 'validate' can't be unconditionally invoked because the receiver can be 'null'. Try making the call conditional (using '?.') or adding a null check to the target ('!').
/* dart 2.0 must implement null safety, try add use safe calls "?" when declaring variable or use null check operator "!" behind object */ bool validate() { bool status = false; final form = formKey.currentState; form?.s... Add solution -
Dart 2021-08-27 22:43:01
flutter check empty object
Summary This answer holds true, except for isNull and isNotNull. They no longer provide type promotion when Null Safety is introduced in dart/flutter in the future. Other helpers like isNullOrEmpty do not provide type promotion, as they are in a different... Add solution