code: function(property, computeLevels) {
        var prop = property || 'start';
        var node = this.graph.getNode(this.root);
        $.extend(node, {
          'drawn' : true,
          'exist' : true,
          'selected' : true
        });
        NodeDim.compute(this.graph, prop, this.config);
        if (!!computeLevels || !("_depth" in node)) {
          this.graph.computeLevels(this.root, 0, "ignore");
        }
        
        this.computePositions(node, prop);
      }
docs: /*
  Method: compute
  
  Computes nodes' positions.