### Question:
Missing implements Bson { public static boolean isNullOrMissing(Object value) { return (value == null || value instanceof Missing); } private  Missing(); static Missing getInstance(); static Object ofNullable(Object value); static boolean isNeitherNullNorMissing(Object value); static boolean isNullOrMissing(Object value);  }### Answer:
@Test void testIsNullOrMissing() throws Exception { assertThat(Missing.isNullOrMissing(null)).isTrue(); assertThat(Missing.isNullOrMissing(Missing.getInstance())).isTrue(); assertThat(Missing.isNullOrMissing("value")).isFalse(); }