@Test(expectedExceptions = IllegalArgumentException.class)
 public void testWithinRange2() {
   FLAT_INTERPOLATOR.getNodeSensitivitiesForValue(DATA, 20d, LINEAR_INTERPOLATOR);
 }
 @Test(expectedExceptions = IllegalArgumentException.class)
 public void testNullData2() {
   FLAT_INTERPOLATOR.getNodeSensitivitiesForValue(null, 105d, LINEAR_INTERPOLATOR);
 }