possible more insight into Grape::Middleware::Formatter

grape_middleware_formatter_tracing.rb

module Grape
  module Middleware
    class Formatter < Base
      include ::NewRelic::Agent::MethodTracer

      [ :build_formatted_response,
        :fetch_formatter,
        :ensure_content_type
      ].each do |meth|
        add_method_tracer :fetch_formatter, "Grape/Middleware/Formatter/#{meth}"
      end
    end
  end
end