tight hold of its right ear and left foot, so as to prevent its
undoing itself,) she carried it out into the open air.  `IF I
don't take this child away with me,' thought Alice, `they're sure
to kill it in a day or two:  wouldn't it be murder to leave it
behind?'  She said the last words out loud, and the little thing
grunted in reply (it had left off sneezing by this time).  `Don't

    @ParametricNullness private final V left;
    @ParametricNullness private final V right;

    static <V extends @Nullable Object> ValueDifference<V> create(
        @ParametricNullness V left, @ParametricNullness V right) {
      return new ValueDifferenceImpl<>(left, right);
    }

    private ValueDifferenceImpl(@ParametricNullness V left, @ParametricNullness V right) {
      this.left = left;
      this.right = right;
    }

tight hold of its right ear and left foot, so as to prevent its
undoing itself,) she carried it out into the open air.  `IF I
don't take this child away with me,' thought Alice, `they're sure
to kill it in a day or two:  wouldn't it be murder to leave it
behind?'  She said the last words out loud, and the little thing
grunted in reply (it had left off sneezing by this time).  `Don't

              } else if (map.isExpired(e, now)) {
                // This is a duplicate check, as preWriteCleanup already purged expired
                // entries, but let's accommodate an incorrect expiration queue.
                enqueueNotification(
                    entryKey, hash, value, valueReference.getWeight(), RemovalCause.EXPIRED);
              } else {

              } else if (map.isExpired(e, now)) {
                // This is a duplicate check, as preWriteCleanup already purged expired
                // entries, but let's accommodate an incorrect expiration queue.
                enqueueNotification(
                    entryKey, hash, value, valueReference.getWeight(), RemovalCause.EXPIRED);
              } else {