in src/main/java/org/apache/maven/plugins/clean/Cleaner.java [475:483]
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if ("sessionEnded".equals(method.getName())) {
BackgroundCleaner.sessionEnd();
}
if (delegate != null) {
return method.invoke(delegate, args);
}
return null;
}