public Graphic3d_SequenceOfStructure Assign(Graphic3d_SequenceOfStructure theOther)
 {
     throw new NotImplementedException();
 }
 public void Append(Graphic3d_SequenceOfStructure theSeq)
 {
     throw new NotImplementedException();
 }
 public void Split(int theIndex, Graphic3d_SequenceOfStructure theSeq)
 {
     throw new NotImplementedException();
 }