def _format_complex_property_types(self, prop_type: str, value: Any) -> str:
        """Format complex property types that need special handling."""
        if prop_type == "relation":
            return f"{len(value)} relation(s)" if value else "0 relations"
        elif prop_type == "rollup":
            return self._format_rollup_property(value)
        elif prop_type == "formula":
            return self._format_formula_property(value)
        elif prop_type == "unique_id":
            return self._format_unique_id_property(value)
        elif prop_type == "verification":
            return self._format_verification_property(value)
        else:
            return str(value) if value else ""
Format complex property types that need special handling.
backend/airweave/platform/sources/notion.py