public ET previous() {if (expectedModCount == list.modCount) {if (link != list.voidLink) {lastLink = link;link = link.previous;pos--;return lastLink.data;}throw new NoSuchElementException();}throw new ConcurrentModificationException();}
public ET previous(){if (expectedModCount == list.modCount){if (link != list.voidLink){lastLink = link;link = link.previous;pos--;return lastLink.data;}throw new java.util.NoSuchElementException();}throw new java.util.ConcurrentModificationException();}