conf.put(new PropertySimple("needed", "test"));
conf.put(new PropertySimple("optional", null));
CompositeOperation cop = delegate.updateGenerateOperationFromProperties(conf, new Address());
Assert.assertEquals(cop.numberOfSteps(), 2);
for (int i = 0; i < cop.numberOfSteps(); i++) {
Operation step = cop.step(0);
Assert.assertEquals(step.getOperation(), "write-attribute");
Map<String, Object> stepProps = step.getAdditionalProperties();