Which JavaScript file is the angular.module() function defined in?

I was wondering if anybody knows which file the angular.module() function is defined in. I ask because when I type "angular." My IDE's auto-complete feature does not show the module method on the angular object.

Regarding the files in which the .module() is defined:

You might want to search for the function module(name, requires, configFn) string to locate it in your version of AngularJS.

According to the AngularJS documentation it's in the ng module.