public List<Function> getSourceFunctions() {
		List<Function> sourceFunctions = new ArrayList<>(sourceToTargetsMap.keySet());
		Collections.sort(sourceFunctions, FUNCTION_COMPARATOR);
		return sourceFunctions;
	}
Removes all functions in the model that come from the given
program

@param program the program to remove functions from
Ghidra/Features/Base/src/main/java/ghidra/features/base/codecompare/model/MatchedFunctionComparisonModel.java