@Entity
public class Parent {

	private Set<Child<?>> children;

	public Set<Child<?>> getChildren() {
		return children;
	}
	public void setChildren(Set<Child<?>> children) {
		this.children = children;
	}
}

@Entity
public class Child<T> {

	private T t;

	public T getT() {
		return t;
	}
	public void setT(T t) {
		this.t = t;
	}
}

@Generated(value = "org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor")
@StaticMetamodel(Parent.class)
public abstract class Parent_ {

	public static volatile SetAttribute<Parent, Child<T>> children;

}

@Generated(value = "org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor")
@StaticMetamodel(Child.class)
public abstract class Child_ {

	public static volatile SingularAttribute<Child, Object> t;

}