public Object objValue(TraceObject obj, long snap, String key) {
		TraceObjectValue value = obj.getValue(snap, key);
		return value == null ? null : value.getValue();
	}
Get the value (not value entry) of an object

@param obj the object
@param snap the snapshot key
@param key the entry key
@return the value, possibly null
Ghidra/Debug/Framework-TraceModeling/src/test/java/ghidra/trace/database/ToyDBTraceBuilder.java