vtkDataSet::GetDataObjectType is not virtual
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
vtkDataSet::GetDataObjectType should be a virtual method, it is not currently.
Because it's not virtual, if you have an object of type vtkDataSet then you have to already know what derived type is and down cast it in order to get the right return value from this method making it pretty much useless for determining the object's type.