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: regulate_broadcast_spec.rb
    path of file: ./repos/hyperstack/ruby/hyper-model/spec/batch1/policies
    
    the code of the file until where you have to start completion: require 'spec_helper'
#requ
    
      def react_serializer
        as_json # does not include type: xxx as per reactive-record
      end
      def attribute_names
        [:id, :attr1, :attr2, :attr3, :attr4, :attr5]
      end
      def saved_changes
        Hash[*as_json.keys.collect { |attr| [attr, send(attr)] }.flatten(1)]
      end
      attr_accessor :id, :attr1, :attr2, :attr3, :attr4, :attr5
    end