throw new AssertionError();
    }

    /**
     * Unsafely sets the given index of this segment's internal hash table to be the given entry.
     */
    void setTableEntryForTesting(int i, InternalEntry<K, V, ?> entry) {
      table.set(i, castForTesting(entry));
    }

    /** Unsafely returns a copy of the given entry. */