# File lib/atom/element.rb, line 648
    def HasLinks.included(klass)
      klass.atom_elements :link, :links, Atom::Link
    end

# File lib/atom/element.rb, line 652
    def find_link(criteria)
      self.links.find do |l|
        criteria.all? { |k,v| l.send(k) == v }
      end
    end