https://gist.github.com/tsuka/2a43bd374f79a8aa1537439e07668152
https://github.com/expajp/method_missing_exercises/blob/master/reimplement_dynamic_finders/my_dynamic_finders.rb
https://gist.github.com/teslur/1ae570cfdf6eb639003b4f9ddd2f3843
https://github.com/akinov/method_missing_exercises/blob/reimprement/reimplement_dynamic_finders/my_dynamic_finders.rb
