def resolve_node(
        cls,
        node_id: str,
        *,
        info: Info,
        required: bool = False,
    ) -> AwaitableOrValue[Optional[Self]]:
        """Resolve a node given its id.

        This method is a convenience method that calls `resolve_nodes` for
        a single node id.

        Args:
            info: The strawberry execution info resolve the type name from.
            node_id: The id of the node to be retrieved.
            required: if the node is required or not to exist. If not, then None
                should be returned if it doesn't exist. Otherwise an exception
                should be raised.

        Returns:
            The resolved node or None if it was not found
        """
        retval = cls.resolve_nodes(info=info, node_ids=[node_id], required=required)

        if inspect.isawaitable(retval):
            return resolve_awaitable(retval, lambda resolved: next(iter(resolved)))

        return next(iter(cast("Iterable[Self]", retval)))
Resolve a node given its id.

        This method is a convenience method that calls `resolve_nodes` for
        a single node id.

        Args:
            info: The strawberry execution info resolve the type name from.
            node_id: The id of the node to be retrieved.
            required: if the node is required or not to exist. If not, then None
                should be returned if it doesn't exist. Otherwise an exception
                should be raised.

        Returns:
            The resolved node or None if it was not found
        
strawberry/relay/types.py