Method map

runtime/Java/src/org/antlr/v4/runtime/misc/MultiMap.java:14–21

(K key, V value)

public class MultiMap<K, V> extends LinkedHashMap<K, List<V>> {
	public void map(K key, V value) {
		List<V> elementsForKey = get(key);
		if ( elementsForKey==null ) {
			elementsForKey = new ArrayList<V>();
			super.put(key, elementsForKey);
		}
		elementsForKey.add(value);
	}

	public List<Pair<K,V>> getPairs() {
		List<Pair<K,V>> pairs = new ArrayList<Pair<K,V>>();