arangosh> var formatPlan = function (plan) { return { estimatedCost: plan.estimatedCost, nodes: plan.nodes.map(function(node) { return node.type; }) }; };
arangosh> formatPlan(stmt.explain().plan);
{ 
  "estimatedCost" : 3, 
  "nodes" : [ 
    "SingletonNode", 
    "EnumerateCollectionNode", 
    "ReturnNode" 
  ] 
}