code: def update(self, style_sheet=values.unset):
          
          return self._proxy.update(style_sheet=style_sheet, )
docs: Update the StyleSheetInstance
  
          :param dict style_sheet: The JSON string that describes the style sheet object
  
          :returns: Updated StyleSheetInstance
          :rtype: twilio.rest.autopilot.v1.assistant.style_sheet.StyleSheetInstance