Avoid unnecessary type assertions

Rule id

avoid-unnecessary-type-assertions

Description

Warns about unnecessary usage of 'is' and 'whereType' operators.

Example

Example 1 Check is same type

class Example {
  final myList = <int>[1, 2, 3];

  void main() {
    final result = myList is List<int>; // LINT
    myList.whereType<int>();
  }
}

Example 2 whereType method

main(){
  ['1', '2'].whereType<String?>(); // LINT
}