### Question:
Constructor implements TreeConstructor<E, MutableSettableStructuredNode<E>, LinkedTree<E>> { @Override public Class<? extends Tree> forClass() { return LinkedTree.class; }  @Override @SafeVarargs final LinkedTree<E> build(E e, LinkedTree<E>... subtrees); @Override Class<? extends Tree> forClass();  }### Answer:
@Test public void forClass() { final Constructor<String> constructor = new Constructor<>(); assertEquals(LinkedTree.class, constructor.forClass()); }