Как узнать, какая функция используется

ArrayList<Pair<String, String>> list = new ArrayList<>();
list.add(new Pair<>("ag1", "val1"));  list.add(new Pair<>("ag1", "val2"));
list.add(new Pair<>("ag1", "val4"));  list.add(new Pair<>("ag2", "val2"));
list.add(new Pair<>("ag2", "val4"));  list.add(new Pair<>("ag3", "val2"));
list.add(new Pair<>("ag3", "val2"));  list.add(new Pair<>("ag3", "val3"));

List<String> arguments = list.stream().map(Pair::getKey).distinct().collect(Collectors.toList());
List<String> values = list.stream().map(Pair::getValue).distinct().collect(Collectors.toList());

Map<String, Map<String,Integer>> map = new TreeMap<>();

for(String ag : arguments){
    map.putIfAbsent(ag, new TreeMap<>());

    for(String val : values){
        if(list.contains(new Pair<>(ag,val))){
            map.get(ag).put(val, 1);
        }else{
            map.get(ag).put(val,0);        
        }
    }

}
System.out.println(map);
//{ag1={val1=1, val2=1, val3=0, val4=1}, 
   ag2={val1=0, val2=1, val3=0, val4=1}, 
   ag3={val1=0, val2=1, val3=1, val4=0}}

ArrayList<Pair<String, String>> list = new ArrayList<>();
list.add(new Pair<>("ag1", "val1"));  list.add(new Pair<>("ag1", "val2"));
list.add(new Pair<>("ag1", "val4"));  list.add(new Pair<>("ag2", "val2"));       
list.add(new Pair<>("ag2", "val4"));  list.add(new Pair<>("ag3", "val2"));
list.add(new Pair<>("ag3", "val2"));  list.add(new Pair<>("ag3", "val3"));

List<String> arguments = list.stream().map(Pair::getKey).distinct().sorted().collect(Collectors.toList());
List<String> values = list.stream().map(Pair::getValue).distinct().sorted().collect(Collectors.toList());

short[][] res = new short[arguments.size()][values.size()];      

for(int ag = 0 ; ag<arguments.size() ; ag++){
    for(int val = 0 ; val<values.size() ; val++){  
        if(list.contains(new Pair<>(arguments.get(ag),values.get(val)))){
            res[ag][val] = 1;
        }else{
            res[ag][val] = 0;        
        }
    }    
}
System.out.println(Arrays.deepToString(res)); 
// [[1, 1, 0, 1], [0, 1, 0, 1], [0, 1, 1, 0]]