virtual AliSegmentID * LoadSegment(Int_t index);//load segment with index to the memory
virtual AliSegmentID * LoadEntry(Int_t index); //load segment entry from position index in tree
virtual void StoreSegment(Int_t index);//write segmen persistent
virtual AliSegmentID * LoadSegment(Int_t index);//load segment with index to the memory
virtual AliSegmentID * LoadEntry(Int_t index); //load segment entry from position index in tree
virtual void StoreSegment(Int_t index);//write segmen persistent