Hi,
seems like ToContainsFilter was removed from smack 4.0
However, I don't see it mentioned in the upgrade guide or changelog.
BTW: there still seems to be an integration test using it: https://github.com/igniterealtime/Smack/blob/master/smack-core/src/integration-t est/java/org/jivesoftware/smack/filter/ToContainsFilterTest.java
How does that even compile?