store_accessor

# File activerecord/lib/active_record/store.rb, line 36
      def store_accessor(store_attribute, *keys)
        Array(keys).flatten.each do |key|
          define_method("#{key}=") do |value|
            send(store_attribute)[key] = value
            send("#{store_attribute}_will_change!")
          end
    
          define_method(key) do
            send(store_attribute)[key]
          end
        end
      end