code: func (s *MatcherSession) PendingSections(bit uint) int {
  	fetcher := make(chan uint)
  
  	select {
  	case <-s.quit:
  		return 0
  	case s.matcher.counters <- fetcher:
  		fetcher <- bit
  		return int(<-fetcher)
  	}
  }
docs: // PendingSections returns the number of pending section retrievals belonging to
  // the given bloom bit index.