* putAll()}.
   *
   * @return a map view from each row key to a secondary map from column keys to values
   */
  Map<R, Map<C, V>> rowMap();

  /**
   * Returns a view that associates each column key with the corresponding map from row keys to
   * values. Changes to the returned map will update this table. The returned map does not support

  private final ImmutableMap<K, V> map;

  ImmutableMapKeySet(ImmutableMap<K, V> map) {
    this.map = map;
  }

  @Override
  public int size() {
    return map.size();
  }

  @Override
  public UnmodifiableIterator<K> iterator() {
    return map.keyIterator();
  }

  @Override
  public boolean contains(@Nullable Object object) {
    return map.containsKey(object);
  }

  @Override

        callback.store(params, numericData);

        // Test with boolean data
        Map<String, Object> booleanData = new HashMap<>();
        booleanData.put("flag", true);
        callback.store(params, booleanData);

        // Test with nested map
        Map<String, Object> nestedData = new HashMap<>();
        Map<String, String> innerMap = new HashMap<>();
        innerMap.put("inner", "value");

    ImmutableBiMap<String, Integer> map = new Builder<String, Integer>().build();
    assertEquals(Collections.<String, Integer>emptyMap(), map);
    assertEquals(Collections.<Integer, String>emptyMap(), map.inverse());
    assertThat(map).isSameInstanceAs(ImmutableBiMap.of());
  }

  public void testSingletonBuilder() {
    ImmutableBiMap<String, Integer> map = new Builder<String, Integer>().put("one", 1).build();

   *
   * @throws NullPointerException if any key or value in {@code map} is null
   */
  public static <K, V> ImmutableMap<K, V> copyOf(Map<? extends K, ? extends V> map) {
    if ((map instanceof ImmutableMap) && !(map instanceof SortedMap)) {
      @SuppressWarnings("unchecked") // safe since map is not writable
      ImmutableMap<K, V> kvMap = (ImmutableMap<K, V>) map;
      if (!kvMap.isPartialView()) {
        return kvMap;
      }

  }

  public void testEmptyMap() {
    Map<Character, String> map = ImmutableMap.of();
    ArrayBasedEscaperMap fem = ArrayBasedEscaperMap.create(map);
    // Non-null array of zero length.
    assertThat(fem.getReplacementArray()).isEmpty();
  }

  public void testMapLength() {
    Map<Character, String> map =
        ImmutableMap.of(
            'a', "first",
            'z', "last");

  }

  public void testTransformSingletonMapEquality() {
    Map<String, String> map =
        transformValues(ImmutableMap.of("a", 1), Functions.toStringFunction());
    Map<String, String> expected = ImmutableMap.of("a", "1");
    assertMapsEqual(expected, map);
    assertThat(map.get("a")).isEqualTo(expected.get("a"));
  }

  public void testTransformIdentityFunctionEquality() {

#
# Specification:
# map: {
#     [table-name or $$ALL$$] = map:{
#         ; [column-name (with hint)]=[classification-name]
#     }
# }
#
# *The line that starts with '#' means comment-out.
#
map:{
    #; $$ALL$$       = map:{suffix:_FLG=Flg}
}

    MapMakerInternalMap<Object, Object, ?, ?> map = makeMap(createMapMaker());

    assertThat(map.keyStrength()).isEqualTo(Strength.STRONG);
    assertThat(map.valueStrength()).isEqualTo(Strength.STRONG);
    assertThat(map.keyEquivalence).isEqualTo(map.keyStrength().defaultEquivalence());
    assertThat(map.valueEquivalence()).isEqualTo(map.valueStrength().defaultEquivalence());

    assertThat(map.entryHelper)

    MapMakerInternalMap<Object, Object, ?, ?> map = makeMap(createMapMaker());

    assertThat(map.keyStrength()).isEqualTo(Strength.STRONG);
    assertThat(map.valueStrength()).isEqualTo(Strength.STRONG);
    assertThat(map.keyEquivalence).isEqualTo(map.keyStrength().defaultEquivalence());
    assertThat(map.valueEquivalence()).isEqualTo(map.valueStrength().defaultEquivalence());

    assertThat(map.entryHelper)