The type com.google.common.collect.ImmutableSortedSet cannot be resolved

[xiaokanghub]

public void onJoin(JoinEvent event) throws Exception {
manager.onJoinEvent(event.getChannel().getUsers().toArray());

}
When I refactor your code, the PIRCBOTX package has been imported, the version is 2.0.1, but the error has been reported.

"Event.getchannel (). Getusers (). ToArray ()" Here's an error.
Error:The type com.google.common.collect.ImmutableSortedSet cannot be resolved. It is indirectly referenced from required .class files

[xiaokanghub]

now its ok, need to add http://maven.outofmemory.cn/com.google.guava/guava/r07/