text: // you should be able to import networks consisting of one vertex collection
  // as well as one edge collection.
  // vertex documents need to be imported seperatly, if you want them to
  // have some useful data
  //
  // http://snap.stanford.edu/data/egonets-Twitter.html
  // http://snap.stanford.edu/data/egonets-Facebook.html
  // http://snap.stanford.edu/data/egonets-Gplus.html
  // http://snap.stanford.edu/data/wiki-Vote.html
  
  var graph_module = require("@avocadodb/general-graph");
  
  module.exports = function (gname, shards, repFac) {
    var vColl = gname+"_v", eColl = gname+"_e";
    shards = shards || 4;
    repFac = repFac || 1;
    
    var graph;
    var exists = graph_module._list().indexOf(gname) != -1;
    if (!exists) {
      graph = graph_module._create(gname);
      db._create(vColl, {numberOfShards: shards,
                         indexBuckets: shards,
                         replicationFactor:repFac});
      graph._addVertexCollection(vColl);
      db._createEdgeCollection(eColl, {
                               numberOfShards: shards,
                               //indexBuckets: shards,
                               replicationFactor: repFac,
                               shardKeys:["vertex"],
                               distributeShardsLike:vColl});
      
      var rel = graph_module._relation(eColl, [vColl], [vColl]);
      graph._extendEdgeDefinitions(rel);
    }
  };
  