You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: chain.rb
    path of file: ./repos/newrelic-ruby-agent/lib/new_relic/agent/instrumentation/async_http
    
    the code of the file until where you have to start completion: # This file is distributed under New Relic's license terms.
# See https://github.com/newrelic/newrelic-ruby-agent/blob/main/LICENS
    
    def self.instrument!
      ::Async::HTTP::Internet.class_eval do
        include NewRelic::Agent::Instrumentation::AsyncHttp

        alias_method(:call_without_new_relic, :call)

        def call(method, url, headers = nil, body = nil)
          call_with_new_relic(method, url, headers, body) do |hdr|
            call_without_new_relic(method, url, hdr, body)
          end
        end
      end
    end