code: def update_fw_local_result_str(self, os_result=None, dcnm_result=None,
                                     dev_result=None):
          
          fw_dict = self.get_fw_dict()
          if os_result is not None:
              fw_dict['os_status'] = os_result
          if dcnm_result is not None:
              fw_dict['dcnm_status'] = dcnm_result
          if dev_result is not None:
              fw_dict['dev_status'] = dev_result
          self.update_fw_dict(fw_dict)
docs: Update the FW result in the dict.