def get_field_deserializers(self,) -> dict[str, Callable[[ParseNode], None]]:
        """
        The deserialization information for the current model
        Returns: dict[str, Callable[[ParseNode], None]]
        """
        from ....models.item_body import ItemBody
        from ....models.key_value_pair import KeyValuePair
        from ....models.teamwork_activity_topic import TeamworkActivityTopic
        from ....models.teamwork_notification_recipient import TeamworkNotificationRecipient

        from ....models.item_body import ItemBody
        from ....models.key_value_pair import KeyValuePair
        from ....models.teamwork_activity_topic import TeamworkActivityTopic
        from ....models.teamwork_notification_recipient import TeamworkNotificationRecipient

        fields: dict[str, Callable[[Any], None]] = {
            "activityType": lambda n : setattr(self, 'activity_type', n.get_str_value()),
            "chainId": lambda n : setattr(self, 'chain_id', n.get_int_value()),
            "previewText": lambda n : setattr(self, 'preview_text', n.get_object_value(ItemBody)),
            "recipient": lambda n : setattr(self, 'recipient', n.get_object_value(TeamworkNotificationRecipient)),
            "teamsAppId": lambda n : setattr(self, 'teams_app_id', n.get_str_value()),
            "templateParameters": lambda n : setattr(self, 'template_parameters', n.get_collection_of_object_values(KeyValuePair)),
            "topic": lambda n : setattr(self, 'topic', n.get_object_value(TeamworkActivityTopic)),
        }
        return fields

        The deserialization information for the current model
        Returns: dict[str, Callable[[ParseNode], None]]
        
msgraph/generated/chats/item/send_activity_notification/send_activity_notification_post_request_body.py