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: marshalling.rb
    path of file: ./repos/newrelic-ruby-agent/test/performance/suites
    
    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/LICENSE for complete details.
# frozen_stri
    
  def test_basic_marshalling_json
    with_config(:normalize_json_string_encodings => true) do
      marshaller = NewRelic::Agent::NewRelicService::JsonMarshaller.new
      measure(ITERATIONS) do
        marshaller.dump(@payload)
        marshaller.dump(@tt_payload)
      end
    end
  end