docs: def _validate_request_action(self, action):
          """ Validate action from the request json,
              according to APPLY_CONNECTIVITY_CHANGES_ACTION_REQUIRED_ATTRIBUTE_LIST
          """
          is_fail = False
          fail_attribute = ""
          for class_attribute in self.APPLY_CONNECTIVITY_CHANGES_ACTION_REQUIRED_ATTRIBUTE_LIST:
              if type(class_attribute) is tuple:
                  if not hasattr(action, class_attribute[0]):
                      is_fail = True
                      fail_attribute = class_attribute[0]
                  if not hasattr(getattr(action, class_attribute[0]), class_attribute[1]):
                      is_fail = True
                      fail_attribute = class_attribute[1]
              else:
                  if not hasattr(action, class_attribute):
                      is_fail = True
                      fail_attribute = class_attribute
  
          if is_fail:
              raise Exception(self.__class__.__name__,
                              "Mandatory field {0} is missing in ApplyConnectivityChanges request json".format(
                                  fail_attribute))