code: def to_h
        {
          :date => AdManagerApi::AdManagerDate.new(
              @api, @time.year, @time.month, @time.day
          ).to_h,
          :hour => @time.hour,
          :minute => @time.min,
          :second => @time.sec,
          :time_zone_id => @timezone.identifier
        }
      end
docs: Convert AdManagerDateTime into a hash representation which can be consumed
   by the Ad Manager API. E.g., a hash that can be passed as PQL DateTime
   variables.
  
   Returns:
     - ad_manager_datetime_hash: a hash representation of an
       AdManagerDateTime