# File lib/librarian/manifest_set.rb, line 19
      def cyclic?(manifests)
        manifests = Hash[manifests.map{|m| [m.name, m]}] if Array === manifests
        manifest_pairs = Hash[manifests.map{|k, m| [k, m.dependencies.map{|d| d.name}]}]
        adj_algs.cyclic?(manifest_pairs)
      end