public void setProbabilityThreshold(double thresh) {
		probabilityThreshold = thresh;
	}
Sets the probability threshold.  Address where the probability of having the target
label is less than the threshold are not included in the map returned by 
{@link FunctionStartClassifier#classify(AddressSetView, TaskMonitor)}
@param thresh new threshold
Ghidra/Extensions/MachineLearning/src/main/java/ghidra/machinelearning/functionfinding/FunctionStartClassifier.java