inherited

# File railties/lib/rails/engine.rb, line 361
      def inherited(base)
        unless base.abstract_railtie?
          base.called_from = begin
            # Remove the line number from backtraces making sure we don't leave anything behind
            call_stack = caller.map { |p| p.sub(/:\d+.*/, '') }
            File.dirname(call_stack.detect { |p| p !~ %[railties[\w.-]*/lib/rails|rack[\w.-]*/lib/rack] })
          end
        end

        super
      end