[Rails] When upgrading from Rails 4.2 to 5.1.4 is there a generator for Action Cable files?

I've recently upgraded my Rails 4.2 application to Rails 5.1.4, and I'm trying to work with Action Cable.  I've been reading up on it a little and it seems that there are some files I'm currently missing such as, app/assets/javascripts/cable.js.  Is there a rails generator to generate all of the "required" action cable default files such as cable.js. Or should I just work through the example here and add them as I go?

Thanks!

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