### Question:
Result extends ArrayList<Result> { public boolean isNull() { return false; } Result();  Result(Result result);  Result(List<Result> list);  Result(Boolean valueBoolean);  Result(Date resultDate, Boolean valueBoolean, Object obj);  Result(Concept valueCoded);  Result(Date resultDate, Concept valueCoded, Object obj);  Result(Obs obs);  Result(Date valueDatetime);  Result(Date resultDate, Date valueDatetime, Object obj);  Result(Double valueNumeric);  Result(Date resultDate, Double valueNumeric, Object obj);  Result(Integer valueNumeric);  Result(Date resultDate, Integer valueNumeric, Object obj);  Result(String valueText);  Result(Date resultDate, String valueText, Object obj);  Result(Date resultDate, Datatype datatype, Boolean valueBoolean, Concept valueCoded, Date valueDatetime,
	    Double valueNumeric, String valueText, Object object); static final Result emptyResult(); Datatype getDatatype(); void setResultDate(Date resultDatetime); void setDatatype(Datatype datatype); void setValueBoolean(Boolean valueBoolean); void setValueCoded(Concept valueCoded); void setValueDatetime(Date valueDatetime); void setValueNumeric(Integer valueNumeric); void setValueNumeric(Double valueNumeric); void setValueText(String valueText); Date getResultDate(); Object getResultObject(); void setResultObject(Object object); Boolean toBoolean(); Concept toConcept(); Date toDatetime(); Double toNumber(); @Override String toString(); Object toObject(); boolean isNull(); boolean exists(); boolean contains(Concept concept); Result gt(Integer value); boolean containsConcept(Integer conceptId); boolean contains(Result result); Result unique(); @Override boolean equals(Object obj); @Override int hashCode(); @Override Result get(int index); Result earliest(); Result latest();  }### Answer:
@Test public void isNull_shouldReturnFalse() { Assert.assertFalse(new Result().isNull()); }