func NewSeriesIDSet() *SeriesIDSet {
	return &SeriesIDSet{
		bitmap: roaring.NewBitmap(),
	}
}
NewSeriesIDSet returns a new instance of SeriesIDSet.
package tsdb
import (
	"io"
	"sync"
	"github.com/RoaringBitmap/roaring"
)
type SeriesIDSet struct {
	sync.RWMutex
	bitmap *roaring.Bitmap
}