def post_push_entries(self):
pass<EOL>
Called after the entries have been pushed. Useful if you need to do
post-processing like closing connection, or sending entries buffered in
:meth:`push_entry`.

If an exception is raised in this method, the status of all the entries
of the backend will be considered failed. You can also raise
:class:`PushEntriesFailed` with a custom user message to mark their
status as failed. If you want to mark individual entries as failed,
raise :class:`PushEntriesFailed` with ``entries`` being a dictionary
containing entries as keys, and error messages as values.