@delegate_manager
    def root_nodes(self):
        return self._mptt_filter(parent=None)
Last return value of the library.
dataset/ETHPy150Open django-mptt/django-mptt/mptt/managers.py/TreeManager.root_nodes--crossover with--dataset/ETHPy150Open hgrecco/pyvisa/pyvisa/highlevel.py/VisaLibraryBase.last_status