File: GenericTest12b.java

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@SuppressWarnings("nullness") // Don't want to depend on @Nullable
class GenericTest12b {
    class Cell<T1 extends Object> {}

    class Node<CONTENT extends Object> {
        public Node(Cell<CONTENT> userObject) {}

        void nodecall(Cell<CONTENT> userObject) {}
    }

    class RootNode extends Node<Void> {
        public RootNode() {
            super(new Cell<Void>());
            call(new Cell<Void>());
            nodecall(new Cell<Void>());
        }

        void call(Cell<Void> userObject) {}
    }
}