arangosh> var examples = require("@arangodb/graph-examples/example-graph.js");
arangosh> var graph = examples.loadGraph("routeplanner");
arangosh> graph._closeness({direction : 'outbound', weight : 'distance'});
{
"germanCity/Cologne" : 0.5,
"germanCity/Hamburg" : 0.3333333333333333,
"germanCity/Berlin" : 0.25,
"frenchCity/Lyon" : 0,
"frenchCity/Paris" : 1
}