text: // this is just for speical testing of single object
  
  let jsroot = require("jsroot");
  let fs = require("fs");
  
  let filename = "https://jsroot.gsi.de/files/hsimple.root",
      itemname = "hpxpy";
  
  jsroot.openFile(filename)
        .then(file => file.readObject(itemname))
        .then(obj => jsroot.makeSVG( { object: obj, width: 1200, height: 800, option: "lego2" }))
        .then(svg => {
              fs.writeFileSync("lego.svg", svg);
              console.log('create lego.svg file size', svg.length);
           });
  