code: def text_decoration(self, decoration):
          
          if decoration.lower() == 'linethrough':
              d = pgmagick.DecorationType.LineThroughDecoration
          else:
              decoration_type_string = "%sDecoration" % decoration.title()
              d = getattr(pgmagick.DecorationType, "%s" % decoration_type_string)
          decoration = pgmagick.DrawableTextDecoration(d)
          self.drawer.append(decoration)
docs: text decoration
  
          :param decoration: 'no', 'underline', 'overline', 'linethrough'
          :type decoration: str