def heartbeat(self):
        if not self.listener.has_clients():
            self.set_idle_state()
        self.after(2000, self.heartbeat)
Returns true if the photo has been removed by the posting user, making it inaccessible
dataset/ETHPy150Open boakley/robotframework-workbench/rwb/debugger/app.py/DebuggerApp.heartbeat--crossover with--dataset/ETHPy150Open viewfinderco/viewfinder/backend/db/post.py/Post.IsRemoved