let copy = JSON.parse(JSON.stringify(person))
git gc --aggressive --prune=now
public class Hello<T>{
public T test(T a){
return a;
}
}
public static <A,B> B getValue(Map<A,B> map, A key) {
return map.get(key);
}
public class Hello{
public static void test(List<? extends Number> a){}
public static void main(String[] args) {
test(new ArrayList<Integer>());
}
}
