# File lib/rspec/core/configuration_options.rb, line 13
      def configure(config)
        formatters = options.delete(:formatters)

        config.filter_manager = filter_manager

        order(options.keys, :libs, :requires, :default_path, :pattern).each do |key|
          force?(key) ? config.force(key => options[key]) : config.send("#{key}=", options[key]) 
        end

        formatters.each {|pair| config.add_formatter(*pair) } if formatters
      end