def with_id(event_ids)
      Specification.new(reader, result.dup{ |r| r.with_ids = event_ids })
    end
def with_id(event_ids)
      Specification.new(reader, result.dup{ |r| r.with_ids = event_ids })
    end
Limits the query to certain events by given even ids.
 {http://railseventstore.org/docs/read/ Find out more}.

 @param even_ids [Array(String)] ids of event to look for.
 @return [Specification]