assertThat(copy).containsExactly(0, 1).inOrder();
  }

  @SuppressWarnings({"deprecation", "InlineMeInliner"}) // test of a deprecated method
  public void testNewSetFromMapIllegal() {
    Map<Integer, Boolean> map = new LinkedHashMap<>();
    map.put(2, true);
    assertThrows(IllegalArgumentException.class, () -> Sets.newSetFromMap(map));
  }