@Override
        public Traversal<Vertex, Map<String, Object>> get_g_V_asXvX_mapXbothE_weight_foldX_sumXlocalX_asXsX_selectXv_sX_order_byXselectXsX_descX() {
            return g.V().as("v").map(__.bothE().<Double>values("weight").fold()).sum(Scope.local).as("s").select("v", "s").order().by(__.select("s"), desc);
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/OrderTest.java