class RSpec::Core::ConfigurationOptions

def configure(config)
  keys = options.keys
  keys.unshift(:requires) if keys.delete(:requires)
  keys.unshift(:libs)     if keys.delete(:libs)
  formatters = options[:formatters] if keys.delete(:formatters)
  keys.each do |key|
    config.send("#{key}=", options[key]) if config.respond_to?("#{key}=")
  end
  if formatters
    formatters.each do |pair|
      config.add_formatter(*pair)
    end
  end
end