Object actual = Set.of("first", "second");

assertThat(actual)
  .asInstanceOf(InstanceOfAssertFactories.type(Set.class))
  .satisfies(set -> assertThat(set).containsExactly("first", "second")); // unchecked warning

assertThat(actual)
  .asInstanceOf(InstanceOfAssertFactories.COLLECTION) // no implicit `isInstanceOf(Set.class)`
  .containsExactly("first", "second"));

assertThat(map.get("value"))
  .asInstanceOf(new InstanceOfAssertFactory<>(Set.class, Assertions::<String> assertThat)) // verbose
  .containsExactly("first", "second");