NameError (uninitialized constant Enumerators::CompactEnumerator)

In one of my projects, i am using Ruby on Rails and trying to store data in my database. My code for this.

Enumerators::CompactEnumerator.new(
        Enumerators::MapEnumerator.new(events) { |event|
          event_info =
            IssueEventInfo.new(
              github_id: event[:id],
              actor:
                Actor.new(
                  github_login: event[:actor][:login]
                ),
              created_at: Time.parse(event[:createdAt])
            )

I am getting this error while doing so.

NameError (uninitialized constant Enumerators::CompactEnumerator)

I have tried everything to understand whats going on but unable to understand.