@classmethod
def get_by_id(cls, context, node_id):
    """Find a node based on its integer ID and return a Node object.

        :param cls: the :class:`Node`
        :param context: Security context
        :param node_id: the ID of a node.
        :returns: a :class:`Node` object.
        """
    db_node = cls.dbapi.get_node_by_id(node_id)
    node = cls._from_db_object(context, cls(), db_node)
    return node
