Dot shorthands error on map

main.dart

enum MyEnum {
  value1,
  value2,
}

void foo() {
  // Works as expected!
  final Map<MyEnum, String> myMap = <MyEnum, String>{
    MyEnum.value1: 'First',
    .value2: 'Second',
  };

  // Works as expected!
  myMap[.value2] = 'Updated First';

  // Error!
  // The static getter 'value2' isn't defined for the context type 'Object'.
  // Try correcting the name to the name of an existing static getter, or defining a getter or field named 'value2'.
  myMap[.value2];
  myMap.containsKey(.value2);
  myMap.remove(.value2);
}