agentInstance.getClassTransformer().add(sdef2);
invoke(obj, "trivialMethod");
MethodCallStatistics stats = (MethodCallStatistics) getAttr(testMbs, "test:name=TestClass1", "stats");
assertNotNull(stats);
assertEquals("old configuration should be used:", 1, stats.getMethodCallStatistic("xxx").getCalls());
assertEquals("new configuration should be skipped due to incompatibility:",
0, stats.getMethodCallStatistic("yyy").getCalls());
}