code: def validate_account_status(self, data):
          
          deleted_status = 'deleted'
          region_status = data.get('status')
          account_status = data.get('account_status')
          for region in region_status:
              if region['status'] != deleted_status and account_status == deleted_status:
                  raise ValidationError('Account Status cannot be "deleted" if a region is not "deleted"')
docs: Performs field validation for account_status.  If any
          region is not deleted, account_status cannot be deleted