# | Line 669 | Line 669 | public class ConcurrentSkipListMap<K,V> | |
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669 | * @return a predecessor of key | |
670 | */ | |
671 | private Node<K,V> findPredecessor(Comparable<? super K> key) { | |
672 | < | if (key == null) |
672 | > | if (key == null) |
673 | throw new NullPointerException(); // don't postpone errors | |
674 | for (;;) { | |
675 | Index<K,V> q = head; |
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