class RSpec::Core::ConfigurationOptions

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