class Sidekiq::Metrics::Query

def fetch_marks(time_range, granularity)
  [].tap do |result|
    marks = @pool.with { |c| c.hgetall("#{@time.strftime("%Y%m%d")}-marks") }
    marks.each do |timestamp, label|
      time = Time.parse(timestamp)
      if time_range.cover? time
        result << MarkResult.new(time, label, Query.bkt_time_s(time, granularity))
      end
    end
  end
end