### Question:
JSONIndividualMatrixResponse extends JSONBasedIndividualMatrixResponse { public void setDurations(Double[][] durations) { this.durations = durations; } JSONIndividualMatrixResponse(MatrixResult result, MatrixRequest request); Double[][] getDurations(); List<JSON2DDestinations> getDestinations(); List<JSON2DSources> getSources(); Double[][] getDistances(); void setDistances(Double[][] distances); void setDurations(Double[][] durations); void setDestinations(List<JSON2DDestinations> destinations); void setSources(List<JSON2DSources> sources);  }### Answer:
@Test public void setDurations() { durationsMatrixResponse.setDurations(new Double[][]{{1.0, 2.0, 3.0},{1.0, 2.0, 3.0},{1.0, 2.0, 3.0}}); Assert.assertEquals(3, durationsMatrixResponse.getDurations().length); Assert.assertArrayEquals(new Double[]{1.0, 2.0, 3.0}, durationsMatrixResponse.getDurations()[0]); Assert.assertNull(distancesMatrixResponse.getDurations()); }