code: def to_svg(self, zoom):
          
          def on_dump():
              """Dump the knitting pattern to the file.
  
              :return: the SVG XML structure as dictionary.
              """
              knitting_pattern = self.patterns.at(0)
              layout = GridLayout(knitting_pattern)
              instruction_to_svg = default_instruction_svg_cache()
              builder = SVGBuilder()
              kp_to_svg = KnittingPatternToSVG(knitting_pattern, layout,
                                               instruction_to_svg, builder, zoom)
              return kp_to_svg.build_SVG_dict()
          return XMLDumper(on_dump)
docs: Create an SVG from the knitting pattern set.
  
          :param float zoom: the height and width of a knit instruction
          :return: a dumper to save the svg to
          :rtype: knittingpattern.Dumper.XMLDumper
  
          Example:
  
          .. code:: python
  
              >>> knitting_pattern_set.to_svg(25).temporary_path(".svg")
              "/the/path/to/the/file.svg"