public static <K, V> Map<K, V> asTierMap(Map<K, V> map) {
		return from(map).tierKey().map();
	}
public static < K , V > Map < K , V > asTierMap ( Map < K , V > map ) { return from ( map ) . tierKey ( ) . map ( ) ; }
Returns a new tier key {@link Map} instance

@see Mapper#tierKey()
@param map
@return