this.alternatingKeysAndValues = alternatingKeysAndValues;
    this.size = size;
    this.keyOffset = 0;
    int tableSize = (size >= 2) ? ImmutableSet.chooseTableSize(size) : 0;
    this.keyHashTable =
        RegularImmutableMap.createHashTableOrThrow(alternatingKeysAndValues, size, tableSize, 0);
    Object valueHashTable =