def _check_if_queryset_is_initialized(self) -> bool:
        """
        Checks if the QuerySetProxy is already set and ready.
        :return: result of the check
        :rtype: bool
        """
        return (
            hasattr(self.queryset_proxy, "queryset")
            and self.queryset_proxy.queryset is not None
        )

        Checks if the QuerySetProxy is already set and ready.
        :return: result of the check
        :rtype: bool
        
ormar/relations/relation_proxy.py