# 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

```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

```js
Services.wm.addListener()
Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator)
```