How to use the svgdom.roundBox function in svgdom

window.stripped = function(string) {
  string = string.replace(/\s+/g, '')
  if(string.slice(-1) == ';') string = string.slice(0, -1)
  return string
}

// This is needed because of IE11 which uses space as a delimiter in matrix
window.matrixStringToArray = function(source){
  return source
    .replace(/matrix\(|\)/, '')
    .split(SVG.regex.delimiter)
    .map(parseFloat)
}

// This is needed because of IE11 creating values like 2.99999 when calculating a transformed box
window.roundBox = function(box) {
  return new SVG.Box(
    Math.round(box.x),
    Math.round(box.y),
    Math.round(box.width),
    Math.round(box.height)
  )
}

// Same thing here with matrices
window.roundMatrix = function (mat) {
  return new SVG.Matrix(
    +(mat.a.toFixed(5)),
    +(mat.b.toFixed(5)),
    +(mat.c.toFixed(5)),
    +(mat.d.toFixed(5)),
    +(mat.e.toFixed(5)),