Related.java 文件源码

public static <E,Y,Y2,Y3,R, A1 extends Attribute<E,?> & Bindable<Y>, A2 extends Attribute<? super Y,?> & Bindable<Y2>, A3 extends Attribute<? super Y2,?> & Bindable<Y3>>
CollectionAttribute<E, R> collection(A1 a1, A2 a2, A3 a3, CollectionAttribute<? super Y3,R> a4) {
    return JoiningAttribute.Constructors.collection(a1, a2, a3, a4);
}