code: func NewSeriesQueryAdapterIterator(sfile *SeriesFile, itr SeriesIDIterator, opt query.IteratorOptions) query.Iterator {
  	return &seriesQueryAdapterIterator{
  		sfile: sfile,
  		itr:   itr,
  		point: query.FloatPoint{
  			Aux: make([]interface{}, len(opt.Aux)),
  		},
  		opt: opt,
  	}
  }
docs: // NewSeriesQueryAdapterIterator returns a new instance of SeriesQueryAdapterIterator.