public TraceSchedule validate(Trace trace, TraceSchedule schedule) {
			if (!contains(trace, schedule)) {
				return null;
			}
			return schedule;
		}
If the given schedule conforms, normalize the schedule to prove it does.

@param trace if available, a trace for determining the event thread
@param schedule the schedule to test
@return the non-null normalized schedule, or null if the given schedule does not conform
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/model/time/schedule/TraceSchedule.java