protected abstract List<Double> create(Double[] elements);

    @Override
    public Double[] createArray(int length) {
      return new Double[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Double> order(List<Double> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleDoubles extends SampleElements<Double> {

    protected abstract List<Short> create(Short[] elements);

    @Override
    public Short[] createArray(int length) {
      return new Short[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Short> order(List<Short> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleShorts extends SampleElements<Short> {

    protected abstract List<Long> create(Long[] elements);

    @Override
    public Long[] createArray(int length) {
      return new Long[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Long> order(List<Long> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleLongs extends SampleElements<Long> {

    protected abstract List<Short> create(Short[] elements);

    @Override
    public Short[] createArray(int length) {
      return new Short[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Short> order(List<Short> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleShorts extends SampleElements<Short> {

 *
 * <p>The iteration ordering of the collections generated by {@code keySet}, {@code keys}, and
 * {@code asMap} has a few subtleties. As long as the set of keys remains unchanged, adding or
 * removing mappings does not affect the key iteration order. However, if you remove all values
 * associated with a key and then add the key back to the multimap, that key will come last in the
 * key iteration order.

    protected abstract List<Float> create(Float[] elements);

    @Override
    public Float[] createArray(int length) {
      return new Float[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Float> order(List<Float> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleFloats extends SampleElements<Float> {

    protected abstract List<Float> create(Float[] elements);

    @Override
    public Float[] createArray(int length) {
      return new Float[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Float> order(List<Float> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleFloats extends SampleElements<Float> {

    @Override
    public Integer[] createArray(int length) {
      return new Integer[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Integer> order(List<Integer> insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleIntegers extends SampleElements<Integer> {

        dataMap.put("test", "value");

        // Execute
        Map<String, Object> result = indexUpdateCallback.ingest(paramMap, dataMap);

        // Verify data is returned unchanged
        assertSame(dataMap, result);
    }

    public void test_ingest_withFactory() {
        // Setup ingest factory
        TestIngester ingester = new TestIngester();

    protected abstract List<Long> create(Long[] elements);

    @Override
    public Long[] createArray(int length) {
      return new Long[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Long> order(List<Long> insertionOrder) {
      return insertionOrder;
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite