# File lib/faraday/adapter.rb, line 37
    def save_response(env, status, body, headers = nil)
      env.status = status
      env.body = body
      env.response_headers = Utils::Headers.new.tap do |response_headers|
        response_headers.update headers unless headers.nil?
        yield(response_headers) if block_given?
      end
    end