# File lib/bundler/graph.rb, line 91
      def initialize(graph_instance)
        @graph_name    = graph_instance.class::GRAPH_NAME
        @groups        = graph_instance.groups
        @relations     = graph_instance.relations
        @node_options  = graph_instance.node_options
        @edge_options  = graph_instance.edge_options
        @output_file   = graph_instance.output_file
        @output_format = graph_instance.output_format
      end