public Object pop()
0:    aload_0
1:    getfield          Stack.implementation Ljava/util/Vector; (4)
4:    aload_0
5:    invokevirtual     Stack.size ()I (5)
8:    iconst_1
9:    isub
10:   invokevirtual     java.util.Vector.remove (I)Ljava/lang/Object; (11)
13:   areturn

LocalVariable index = 0:Stack this