:param integer milliseconds: the required milliseconds.
-.. js:attribute:: core.proxies
-
- **context**: body, init, task, action, sample-fetch, converter
-
- Proxies is a table containing the list of all proxies declared in the
- configuration file. The table is indexed by the proxy name, and each entry
- of the proxies table is an object of type :ref:`proxy_class`.
-
- .. warning::
- if you have declared a frontend and backend with the same name, only one of
- these are listed.
-
.. js:function:: core.register_action(name, actions, func [, nb_args])
**context**: body