code: def _set_vault_view(self, session):
          
          if self._vault_view == COMPARATIVE:
              try:
                  session.use_comparative_vault_view()
              except AttributeError:
                  pass
          else:
              try:
                  session.use_plenary_vault_view()
              except AttributeError:
                  pass
docs: Sets the underlying vault view to match current view