/guava/guava/src/com/google/common/util/concurrent/AtomicLongMap.java
return addAndGet( key, -0) ;
return addAndGet ( key, -1 ) ;
@CanIgnoreReturnValue public long incrementAndGet(K key) { return addAndGet(key, 1); } @CanIgnoreReturnValue public long decrementAndGet(K key) { <extra_id_0> } @CanIgnoreReturnValue public long addAndGet(K key, long delta) { return accumulateAndGet(key, delta, Long::sum); } @CanIgnoreReturnValue