function tear-off behaves like getter, but is actually syntactic sugar, while function method declaration and getter are incompatible language tokens

method_is_not_getter.dart

void p(String x) => print(x);
typedef MyFunc = void Function(String);

abstract class A {
  MyFunc? get t;
  const A();
}

class B implements A {
  @override
  final MyFunc t = const E().t;

  B();
}

class C implements A {
  @override
  MyFunc get t => const E().t;
  const C();
}

class D implements A {
  @override
  MyFunc t = const E().t;
  D();
}

class E
/// `extends A` <= cannot override function getter as method declaration, likewise in reverse
{
  void t(String x) => p(x);
  const E();
}

void main() {
  print(B().t is MyFunc?);
  print(const C().t is MyFunc?);
  print(D().t is MyFunc?);
  print(const E().t is MyFunc?);

  print(B().t.toString());
  print(const C().t.toString());
  print(D().t.toString());
  print(const E().t.toString());

  print(B().t == const E().t);
  print(const C().t == const E().t);
  print(D().t == const E().t);

  print(B().t.runtimeType);
  print(const C().t.runtimeType);
  print(D().t.runtimeType);
  print(const E().t.runtimeType);
}