### Question:
NoPointSensitivity implements PointSensitivityBuilder { @Override public MutablePointSensitivities buildInto(MutablePointSensitivities combination) { return combination; } private  NoPointSensitivity(); @Override PointSensitivityBuilder withCurrency(Currency currency); @Override PointSensitivityBuilder mapSensitivity(DoubleUnaryOperator operator); @Override PointSensitivityBuilder combinedWith(PointSensitivityBuilder other); @Override NoPointSensitivity normalize(); @Override MutablePointSensitivities buildInto(MutablePointSensitivities combination); @Override NoPointSensitivity cloned(); @Override String toString();  }### Answer:
@Test public void test_buildInto() { PointSensitivityBuilder base = PointSensitivityBuilder.none(); MutablePointSensitivities combo = new MutablePointSensitivities(); MutablePointSensitivities test = base.buildInto(combo); assertThat(test).isSameAs(combo); assertThat(test.getSensitivities()).isEmpty(); }