How to import a .vtu file programmatically?

Simulation Modeling Toolkit (SMTK) Using SMTK
2

Partial success: I found out that it is libsmtkVTKSession.so that I need to attach the debugger. Moreover, I need to import the .vtu file with smtk::markup::Import, which in turn calls smtk::extension::vtk::io::ImportAsVTKData. So the following questions remain:

  1. Is there a way to print (or log) what SMTK operations are executed in CMB?
  2. Why can’t I import a .vtu file with smtk::session::vtk::Import, but with smtk::markup::Import?
  3. Should I use smtk::markup::Import or directly smtk::extension::vtk::io::ImportAsVTKData?