function loadSvg () {
  const svgexample = '<svg width="640" height="480" xmlns:xlink="' +
    'http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg">' +
    '<g><title>Layer 1</title><rect stroke-width="5" stroke="#000000" ' +
    'fill="#FF0000" id="svg_1" height="35" width="51" y="35" x="32"/>' +
    '<ellipse ry="15" rx="24" stroke-width="5" stroke="#000000" ' +
      'fill="#0000ff" id="svg_2" cy="60" cx="66"/></g></svg>';
  svgCanvas.setSvgString(svgexample);
}
Set the canvas with an example SVG string.
@returns {void}