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 =

  int size;

  @Param Impl impl;

  private static final Object[][] tables = new Object[TEST_CASES][];

  @BeforeExperiment
  public void setUp() {
    int tableSize = ImmutableSet.chooseTableSize(size);
    int mask = tableSize - 1;
    for (int i = 0; i < TEST_CASES; i++) {
      tables[i] = new Object[tableSize];
      for (int j = 0; j < size; j++) {
        Object o = new Object();