code: def widgets(self):
          
          customization = self.activity._json_data.get('customization')
  
          if customization and "ext" in customization.keys():
              return customization['ext']['widgets']
          else:
              return []
docs: Get the Ext JS specific customization from the activity.
  
          :return: The Ext JS specific customization in `list(dict)` form