/guava/android/guava/src/com/google/common/collect/ConcurrentHashMultiset.java
countMap.remove( element, newCounter) ;
countMap.remove ( element, existingCounter ) ;
} } break; } else { if (existingCounter.compareAndSet(oldValue, count)) { if (count == 0) { <extra_id_0> } return oldValue; } } } }