text: public override void CopyFrom(TermState other){Debug.Assert(other is BlockTermState, "can not copy from " + other.GetType().Name);BlockTermState other2 = (BlockTermState)other;base.CopyFrom(other);DocFreq = other2.DocFreq;TotalTermFreq = other2.TotalTermFreq;TermBlockOrd = other2.TermBlockOrd;BlockFilePointer = other2.BlockFilePointer;}