heartbeat: Allow running check function synchronously (in current thread).
heartbeat: Allow running check function synchronously (in current
thread).

superboy0712/realtime,vlstill/ttk4145,vlstill/ttk4145,vlstill/ttk4145,superboy0712/realtime,vlstill/ttk4145,superboy0712/realtime,superboy0712/realtime,superboy0712/realtime,superboy0712/realtime,vlstill/ttk4145,vlstill/ttk4145