package java.util; import checkers.igj.quals.*; @I public class Stack<E> extends @I Vector<E> { private static final long serialVersionUID = 0L; public Stack() @AssignsFields { throw new RuntimeException("skeleton method"); } public E push(E a1) @Mutable { throw new RuntimeException("skeleton method"); } public synchronized E pop() @Mutable { throw new RuntimeException("skeleton method"); } public synchronized E peek() @ReadOnly { throw new RuntimeException("skeleton method"); } public boolean empty() @ReadOnly { throw new RuntimeException("skeleton method"); } public synchronized int search(@ReadOnly Object a1) @ReadOnly { throw new RuntimeException("skeleton method"); } }