arangosh> var examples = require("org/arangodb/graph-examples/example-graph.js");
arangosh> var graph = examples.loadGraph("routeplanner");
arangosh> graph._betweenness({direction : 'outbound', weight : 'distance'});
[ 
  { 
    "germanCity/Berlin" : 0, 
    "germanCity/Hamburg" : 0, 
    "germanCity/Cologne" : 1, 
    "frenchCity/Lyon" : 0, 
    "frenchCity/Paris" : 0 
  } 
]