TreeMultimap builder does not work correctly

[danieldietrich]

import javaslang.collection.LinkedHashMultimap;
import javaslang.collection.TreeMultimap;

public class Test {

    public static void main(String[] args) {

        LinkedHashMultimap<Integer, String> mm1 = LinkedHashMultimap.withSeq().of(1, "1", 2, "2");

        System.out.println(mm1);

        // This does not compile, the types cannot be inferred
        final TreeMultimap<Integer, String> mm2 = TreeMultimap.withSeq().withKeyComparator(null).of(1, "1", 2, "3");

        System.out.println(mm1.equals(mm2));

    }
}