package java.util; import checkers.nullness.quals.*; @checkers.quals.DefaultQualifier("checkers.nullness.quals.NonNull") // Subclasses of this interface/class may opt to prohibit null elements public abstract class AbstractSequentialList<E extends @NonNull Object> extends AbstractList<E> { protected AbstractSequentialList() {} public @Pure E get(int a1) { throw new RuntimeException("skeleton method"); } public E set(int a1, E a2) { throw new RuntimeException("skeleton method"); } public void add(int a1, E a2) { throw new RuntimeException("skeleton method"); } public E remove(int a1) { throw new RuntimeException("skeleton method"); } public boolean addAll(int a1, Collection<? extends E> a2) { throw new RuntimeException("skeleton method"); } public Iterator<E> iterator() { throw new RuntimeException("skeleton method"); } public abstract ListIterator<E> listIterator(int a1); }