code: func (f *Fpdf) TransformScaleXY(s, x, y float64) {
  	f.TransformScale(s, s, x, y)
  }
docs: // TransformScaleXY uniformly scales the width and height of the following
  // text, drawings and images. s is the percentage scaling factor for both width
  // and height. (x, y) is center of scaling.
  //
  // The TransformBegin() example demonstrates this method.