Can't import import org.jivesoftware.smack.util.XmlStringBuilder

Smack Smack Dev
1

error: The import org.jivesoftware.smack.util.XmlStringBuilder cannot be resolved

In the smack javadoc (4.0.4) , XmlStringBuilder class can suport . where can I get the smack.jar (4.0.4 version)?