def offset(self, num_to_skip):
        """Skip to an offset in a query with this collection as parent.

        See
        :meth:`~.firestore_v1beta1.query.Query.offset` for
        more information on this method.

        Args:
            num_to_skip (int): The number of results to skip at the beginning
                of query results. (Must be non-negative.)

        Returns:
            ~.firestore_v1beta1.query.Query: An offset query.
        """
        query = query_mod.Query(self)
        return query.offset(num_to_skip)