### Question:
DoubleAccessor implements PropertyAccessor<Double> { @Override public Double getCopy(Object object) { return object != null ? new Double((Double) object) : null; }  @Override Double fromBytes(Class targetClass, byte[] data); @Override byte[] toBytes(Object object); @Override String toString(Object object); @Override Double fromString(Class targetClass, String s); @Override Double getCopy(Object object); Double getInstance(Class<?> clazz);  }### Answer:
@Test public void testGetCopy() { Double d1 = new Double(4.555); Double d2 = accessor.getCopy(d1); Assert.assertEquals(d1, d2); }