_notEmergencyShutdown() :
This function is an internal view function that checks if the emergencyShutdownTimestamp is equal to 0. If it is, then the function returns true, otherwise it returns false. This function is used to check if the emergency shutdown has been activated or not. (autogenerated documentation)
_isEmergencyShutdown() :
This function checks if an emergency shutdown has been initiated. It does this by checking if the emergencyShutdownTimestamp variable is not equal to 0. If it is not equal to 0, then the function returns true, indicating that an emergency shutdown has been initiated. (autogenerated documentation)