Subtype challenge

main.dart

// TODO: Implement the [isSubtype] function. Must be a general solution, no hardcoding stuff!

// Check if [A] is a subtype of [B], according to https://dart.dev/resources/glossary#subtype
// For example: 
// - int is a subtype of num
// - List<int> is a subtype of List<num>
// - Labrador is a subtype of Animal
bool isSubtype<A, B>() {
  // TODO: Implement this!
}

// ======== VALIDATION =======

void main() {
  assert(isSubtype<int, num>());
  assert(isSubtype<String, Object>());
  
  assert(isSubtype<List<int>, List<dynamic>>());
  assert(isSubtype<List<int>, List<num>>());
  assert(!isSubtype<List<num>, List<int>>());

  assert(isSubtype<Animal, dynamic>());
  assert(isSubtype<Cat, Animal>());
  assert(isSubtype<Dog, Animal>());
  assert(!isSubtype<Cat, Dog>());

  assert(isSubtype<Labrador, Dog>());
  assert(isSubtype<Labrador, Animal>());
  assert(!isSubtype<Animal, Labrador>());
  
  print("Yayy Success! 🎉");
}


// Helper Types

class Animal {}

class Cat implements Animal {}

class Dog extends Animal {}

class Labrador extends Dog {}