assertTrue("Check instance validity - 1", id.getState() == ComponentInstance.VALID);
ServiceReference cs_instance_ref = ipojoHelper.getServiceReferenceByName(CheckService.class.getName(), instance3.getInstanceName());
assertNotNull("Check CheckService availability", cs_instance_ref);
CheckService cs_instance = (CheckService) getContext().getService(cs_instance_ref);
assertTrue("Check service invocation", cs_instance.check());
ServiceReference cs_ref = ipojoHelper.getServiceReferenceByName(CheckService.class.getName(), fooProvider1.getInstanceName());
assertNotNull("Check CheckService availability", cs_ref);
CheckService cs = (CheckService) getContext().getService(cs_ref);
// change the value of the property toto