load_dependency

# File activesupport/lib/active_support/dependencies.rb, line 293
      def load_dependency(file)
        if Dependencies.load? && Dependencies.constant_watch_stack.watching?
          descs = Dependencies.constant_watch_stack.watching.flatten.uniq

          Dependencies.new_constants_in(*descs) { yield }
        else
          yield
        end
      rescue Exception => exception  # errors from loading file
        exception.blame_file! file if exception.respond_to? :blame_file!
        raise
      end