def start_after(self, document_fields):
        """Start query after a cursor with this collection as parent.

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

        Args:
            document_fields (Union[~.firestore_v1beta1.\
                document.DocumentSnapshot, dict, list, tuple]): a document
                snapshot or a dictionary/list/tuple of fields representing a
                query results cursor. A cursor is a collection of values that
                represent a position in a query result set.

        Returns:
            ~.firestore_v1beta1.query.Query: A query with cursor.
        """
        query = query_mod.Query(self)
        return query.start_after(document_fields)
Start query after a cursor with this collection as parent.

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

        Args:
            document_fields (Union[~.firestore_v1beta1.\
                document.DocumentSnapshot, dict, list, tuple]): a document
                snapshot or a dictionary/list/tuple of fields representing a
                query results cursor. A cursor is a collection of values that
                represent a position in a query result set.

        Returns:
            ~.firestore_v1beta1.query.Query: A query with cursor.