Provides a fixed duration timer, either to get a constant think time (see sleep timer), or to get a fixed (minimum) time for a behavior sub-section (see period_begin/period_end timers). Also supports a basic timeout feature through conditions to check if some execution time has elapsed for a delimited behavior sub-section. All durations are in milliseconds. Sleeps for the given time, if any, or the default time set at plug-in import otherwise. Pseudo timer that performs no think time but simply sets a period_begin mark. Sleeps during sufficient time so that the execution time elapsed from the latest period_begin mark and this period_end included is at least the specified duration, if any, or the default timer value set at plug-in import otherwise. Of course, it may happen that the execution time of the delimited block is greater than the required duration, in which case period_end does no sleep at all, but the delimited block is fully executed however (should you want a more preemptive construct, include this block in an ISAC's preemption statement, using this plug-in's time-out condition). True if a time-out timer has been initialized and its value has not been reached yet, false otherwise. True if a time-out timer has been initialized and its value has been reached, false otherwise. Pseudo-sample: initializes a time-out timer, using the latest value set, if any, or the value set at plug-in import otherwise. Pseudo sample: initializes a time-out timer, with the provided value.