import java.io.Serializable;

public class WildcardBounds {
  class BoundedGeneric<B extends Cloneable> {}

  class BoundedGeneric2<B extends Number> {}

  class BoundedGeneric3<B extends Number & Cloneable> {}

  void use() {
    BoundedGeneric<? extends Serializable> a;
    BoundedGeneric<? extends Serializable> b;
    BoundedGeneric<? extends Serializable> c;
  }
}