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use-services
============
Requires the use of ``Services`` rather than ``Cc[].getService()`` where a
service is already defined in ``Services``.
Examples of incorrect code for this rule:
-----------------------------------------
.. code-block:: js
Cc["@mozilla.org/appshell/window-mediator;1"].getService(Ci.nsIWindowMediator);
Components.classes["@mozilla.org/toolkit/app-startup;1"].getService(Components.interfaces.nsIAppStartup);
Examples of correct code for this rule:
---------------------------------------
.. code-block:: js
Services.wm.addListener()
Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator)