code: def is_all_field_none(self):
          
  
          if self._uuid is not None:
              return False
  
          if self._created is not None:
              return False
  
          if self._updated is not None:
              return False
  
          if self._merchant_reference is not None:
              return False
  
          if self._description is not None:
              return False
  
          if self._status is not None:
              return False
  
          if self._amount_total is not None:
              return False
  
          if self._amount_paid is not None:
              return False
  
          if self._qr_code_token is not None:
              return False
  
          if self._tab_url is not None:
              return False
  
          if self._visibility is not None:
              return False
  
          if self._minimum_age is not None:
              return False
  
          if self._require_address is not None:
              return False
  
          if self._redirect_url is not None:
              return False
  
          if self._expiration is not None:
              return False
  
          if self._alias is not None:
              return False
  
          if self._cash_register_location is not None:
              return False
  
          if self._tab_item is not None:
              return False
  
          if self._tab_attachment is not None:
              return False
  
          return True
docs: :rtype: bool