Right-ignoring sequence patterns Right-ignoring patterns are a useful feature to decompose any data which is either a subtype of Seq[A] or a case class with an iterated formal parameter, like for instance Elem(prefix:String, label:String, attrs:MetaData, scp:NamespaceBinding, children:Node*) In those cases, Scala allows patterns having a wildcard-star _* in the rightmost position to stand for arbi