@property
    def is_idle(self):
        return (self.status is None or
                self.app_id in (None, IDLE_APP_ID) or
                (not self.status.is_active_input and not self.ignore_cec))
returns the root nodes that are not referenced
dataset/ETHPy150Open balloob/pychromecast/pychromecast/__init__.py/Chromecast.is_idle--crossover with--dataset/ETHPy150Open eoyilmaz/anima/anima/env/mayaEnv/repr_tools.py/RepresentationGenerator.get_local_root_nodes