return removeEntryForTesting(castForTesting(entry));
    }

    /** Unsafely removes the given entry from the given chain in this segment's hash table. */
    @Nullable E removeFromChainForTesting(
        InternalEntry<K, V, ?> first, InternalEntry<K, V, ?> entry) {
      return removeFromChain(castForTesting(first), castForTesting(entry));
    }

    /**