thoughtbot/griddler — pull request #181 by mixan946 (2014-11-16 20:21:08+00:00)
Title: fix #170

I want to resolve #170 . Instead of storing a reference to constant I decide to store a constant name string. When we access ```processor_class``` it [constantize]( http://api.rubyonrails.org/classes/ActiveSupport/Inflector.html#method-i-constantize) this string.