code: def is_all_field_none(self):
          
  
          if self._id_ is not None:
              return False
  
          if self._amount is not None:
              return False
  
          if self._alias is not None:
              return False
  
          if self._counterparty_alias is not None:
              return False
  
          if self._description is not None:
              return False
  
          if self._merchant_reference is not None:
              return False
  
          if self._type_ is not None:
              return False
  
          if self._attachment is not None:
              return False
  
          return True
docs: :rtype: bool