code: func (s *Serf) GetCachedCoordinate(name string) (coord *coordinate.Coordinate, ok bool) {
  	if !s.config.DisableCoordinates {
  		s.coordCacheLock.RLock()
  		defer s.coordCacheLock.RUnlock()
  		if coord, ok = s.coordCache[name]; ok {
  			return coord, true
  		}
  
  		return nil, false
  	}
  
  	return nil, false
  }
docs: // GetCachedCoordinate returns the network coordinate for the node with the given
  // name. This will only be valid if DisableCoordinates is set to false.