async def METHOD_NAME(self, obj_id: str):
    """Throw an error if an object (of the same type) exists with the given id"""
    if obj_id:
        search = {self.id_property: obj_id}
        if self._api_manager.find_object(self.ram_key, search):
            raise JsonHttpBadRequest(f'{self.description.capitalize()} with given id already exists: {obj_id}')