code: def is_all_field_none(self):
          
  
          if self._BillingInvoice is not None:
              return False
  
          if self._DraftPayment is not None:
              return False
  
          if self._MasterCardAction is not None:
              return False
  
          if self._Payment is not None:
              return False
  
          if self._PaymentBatch is not None:
              return False
  
          if self._RequestResponse is not None:
              return False
  
          if self._ScheduleInstance is not None:
              return False
  
          if self._TabResultResponse is not None:
              return False
  
          if self._WhitelistResult is not None:
              return False
  
          return True
docs: :rtype: bool