code: def get_knob_defaults_as_table(cls):
          
  
          knob_list = [
              {
                  'Knob': name,
                  'Description': cls.get_registered_knob(name).description,
                  'Default': cls.get_registered_knob(name).default
              } for name in sorted(cls._register.keys())
          ]
          return tabulate.tabulate(knob_list, headers='keys', tablefmt='fancy_grid')
docs: Renders knobs in table
          :return: