return this.map.entryHelper.newEntry(self(), key, hash, castForTesting(next));
    }

    /** Unsafely removes the given entry from this segment's hash table. */
    @CanIgnoreReturnValue
    boolean removeTableEntryForTesting(InternalEntry<K, V, ?> entry) {
      return removeEntryForTesting(castForTesting(entry));
    }

    /** Unsafely removes the given entry from the given chain in this segment's hash table. */