code: def is_all_field_none(self):
          
  
          if self._monetary_account_id is not None:
              return False
  
          if self._alias is not None:
              return False
  
          if self._counterparty_alias is not None:
              return False
  
          if self._amount_guaranteed is not None:
              return False
  
          if self._amount_requested is not None:
              return False
  
          if self._expiration is not None:
              return False
  
          if self._issuer is not None:
              return False
  
          if self._issuer_name is not None:
              return False
  
          if self._issuer_authentication_url is not None:
              return False
  
          if self._purchase_identifier is not None:
              return False
  
          if self._status is not None:
              return False
  
          if self._status_timestamp is not None:
              return False
  
          if self._transaction_identifier is not None:
              return False
  
          if self._allow_chat is not None:
              return False
  
          return True
docs: :rtype: bool