Map<String, Object> getOriginals() {
    return originalsWithPrefix("");
  }
@Test
  public void shouldReturnDifferentMapOnEachCallToOriginals() {
    // Given:
    final KsqlRestConfig config = new KsqlRestConfig(ImmutableMap.<String, Object>builder()
        .putAll(MIN_VALID_CONFIGS)
        .put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, "10")
        .build()
    );

    final Map<String, Object> originals1 = config.getOriginals();
    final Map<String, Object> originals2 = config.getOriginals();

    // When:
    originals1.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, "99");

    // Then:
    assertThat(originals2.get(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG), is("10"));
  }