down

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_vertex.rb, line 29
      def down(graph)
        if defined?(@existing_payload)
          vertex = graph.vertices[name]
          vertex.payload = @existing_payload
          vertex.root = @existing_root
        else
          graph.vertices.delete(name)
        end
      end