} finally {
        unlock();
      }
    }

    /** Clears a value that has not yet been set, and thus does not require count to be modified. */
    @CanIgnoreReturnValue
    boolean clearValueForTesting(
        K key,
        int hash,
        WeakValueReference<K, V, ? extends InternalEntry<K, V, ?>> valueReference) {
      lock();
      try {
        AtomicReferenceArray<E> table = this.table;