What's the best way to see a method inside a gem? Answer: binding.pry's show-method (method_name_want_to_checkout)
Binding.pry, Figuring Out Where A Method Comes From

Say you have a method that you keep thinking... where is this activity coming from?

You search the codebase, and you can't find it. Where is it defined? How is it working?

It turns out... it might be from a Gem. In that case, using binding.pry's show-method (method_name_you_want_to_checkout) can be really useful. 

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