import com.dexx.collections.immutable.List; List<String> list = List.of("Java", "Python", "C++"); List<String> newList = list.append("Golang").filter(s -> s.length() > 4); List<Integer> lengths = list.map(String::length); List<Integer> sortedLengths = lengths.sorted(); gradle dependencies { implementation 'com.github.dexx:Collections:0.2.2' }