code: def new_knitting_pattern_set_loader(specification=DefaultSpecification()):
      
      parser = specification.new_parser(specification)
      loader = specification.new_loader(parser.knitting_pattern_set)
      return loader
docs: Create a loader for a knitting pattern set.
  
      :param specification: a :class:`specification
        <knittingpattern.ParsingSpecification.ParsingSpecification>`
        for the knitting pattern set, default
        :class:`DefaultSpecification`