def list(kind=@kind)
       node = ListLevelNode.new(self, @template, kind, @level.level+1)
       yield node
       self.store(node)
     end
def list(kind=@kind)
       node = ListLevelNode.new(self, @template, kind, @level.level+1)
       yield node
       self.store(node)
     end
Creates a new +ListLevelNode+ to implement nested lists