Generics example

main.dart

// T is meant to be a Type
// E is meant to be an Element (List<E>: a list of Elements)
// K is Key (in a Map<K, V>)
// V is Value (as a return value or mapped value)
  
class CacheItem<T, V> {
  T itemToCache;
  V amountToCache;
  CacheItem(T this.itemToCache, V this.amountToCache);
  T get detail => itemToCache;
  set detail(T v) => itemToCache = v;
}

void main() {
  var cached = CacheItem("ABC", 10);
  print(cached.detail);
  cached.detail = "XYZ";
  print(cached.detail);
  print(cached.runtimeType);
}