public static<K,V> Map<K,V> map(K key, V value)
    {
        return new MapBuilder().put(key,value).toMap();
    }
public static<K,V> Map<K,V> map(K key, V value)
    {
        return new MapBuilder().put(key,value).toMap();
    }
public static < K , V > Map < K , V > map ( K key , V value ) { return new MapBuilder ( ) . put ( key , value ) . toMap ( ) ; }
a new map with just [key--&gt;value] maplet
a new map with just [ key -- &gt ; value ] maplet