class WebMock::CallbackRegistry

def self.invoke_callbacks(options, request_signature, response)
  return if @@callbacks.empty?
  CallbackRegistry.callbacks.each do |callback|
    except = callback[:options][:except]
    real_only = callback[:options][:real_requests_only]
    unless except && except.include?(options[:lib])
      if !real_only || options[:real_request]
        callback[:block].call(request_signature, response)
      end
    end
  end
end