# File lib/dragonfly/middleware.rb, line 4
    def initialize(app, dragonfly_app_name, deprecated_arg=nil)
      raise ArgumentError, "mounting Dragonfly::Middleware with a mount point is deprecated - just use Dragonfly::Middleware, #{dragonfly_app_name.inspect}" if deprecated_arg
      @app = app
      @dragonfly_app_name = dragonfly_app_name
    end