# File lib/typhoeus/request/marshal.rb, line 9
      def marshal_dump
        unmarshallable = %w(@on_complete @on_success @on_failure @on_headers @on_body @hydra)
        (instance_variables - unmarshallable - unmarshallable.map(&:to_sym)).map do |name|
          [name, instance_variable_get(name)]
        end
      end