/guava/android/guava/src/com/google/common/util/concurrent/AtomicLongMap.java
if ( atomic.compareAndSet( oldValue, newValue) ) {   return oldValue; }
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if (map.replace(key, atomic, new AtomicLong(delta))) { return delta; } continue outer; } long newValue = oldValue + delta; <extra_id_0> return newValue; } } } } @CanIgnoreReturnValue