docs: private static void assertProfilingWorks(CallStackElement cse) {
  		if (cse.getChildren().isEmpty() || !cse.getChildren().get(0).getSignature().contains("method1")) {
  			throw new IllegalStateException("profiling did not work! " +
  					ManagementFactory.getRuntimeMXBean().getInputArguments() +  "\n" + cse);
  		}
  	}