final MongoMK mk1 = mks.get(0);
final MongoMK mk2 = mks.get(1);
Repository r1 = new Jcr(mk1).createRepository();
Repository r2 = new Jcr(mk2).createRepository();
Session s1 = r1.login(new SimpleCredentials("admin", "admin".toCharArray()));
Session s2 = r2.login(new SimpleCredentials("admin", "admin".toCharArray()));
Node root1 = s1.getRootNode().addNode("session-1");
s1.save();
Node root2 = s2.getRootNode().addNode("session-2");
s2.save();