find_filter_prepend_position (ActionController::Filters::ClassMethods)

    # File lib/action_controller/filters.rb, line 541
            def find_filter_prepend_position(filters, filter_type)
              # prepending a before or around filter puts it at the front of the call chain
              # after filters go before the first after filter in the chain
              if filter_type == :after
                filter_chain.each_with_index do |f,i|
                  return i if f.after?
                end
                return -1
              end
              return 0
            end