@Test(expectedExceptions = IllegalArgumentException.class)
 public void testWithinRange1() {
   LINEAR_EXTRAPOLATOR.getNodeSensitivitiesForValue(DATA, 20d, LINEAR_INTERPOLATOR);
 }
 @Test(expectedExceptions = IllegalArgumentException.class)
 public void testNullData1() {
   LINEAR_EXTRAPOLATOR.getNodeSensitivitiesForValue(null, 102d, LINEAR_INTERPOLATOR);
 }