def summary(self):
    try:
        self.rtsnode.fabric_module.to_normalized_wwn(self.rtsnode.wwn)
    except:
        return ('INVALID WWN', False)
    return (('TPGs: %d' % len(self._children)), None)
def summary(self):
    try:
        self.rtsnode.fabric_module.to_normalized_wwn(self.rtsnode.wwn)
    except:
        return ('INVALID WWN', False)
    return (('TPGs: %d' % len(self._children)), None)