Support for using .loneElement on NonEmptyList http://www.scalatest.org/user_guide/using_matchers#singleElementCollections
Support for using .loneElement on NonEmptyList http://www.scalatest.org/user_guide/using_matchers#singleElementCollections
(Since version ) see corresponding Javadoc for more information.
Companion object for easy importing – rather than mixing in.