findWhere returns error about underscore-java HOT 1 CLOSED

    @Test
    public void findWhere() {
        class Book {
            public final String title;
            public final String author;
            public final Integer year;
            public Book(final String title, final String author, final Integer year) {
                this.title = title;
                this.author = author;
                this.year = year;
            }
            public String toString() {
                return "title: " + title + ", author: " + author + ", year: " + year;
            }
        }
        List<Book> listOfPlays =
            new ArrayList<Book>() { {
              add(new Book("Cymbeline2", "Shakespeare", 1614));
              add(new Book("Cymbeline", "Shakespeare", 1611));
              add(new Book("The Tempest", "Shakespeare", 1611));
            } };
        assertEquals("title: Cymbeline, author: Shakespeare, year: 1611",
            U.findWhere(listOfPlays, asList(
            Tuple.<String, Object>create("author", "Shakespeare"),
            Tuple.<String, Object>create("year", Integer.valueOf(1611)))).get().toString());
        assertEquals("title: Cymbeline, author: Shakespeare, year: 1611",
            new U(listOfPlays).findWhere(asList(
            Tuple.<String, Object>create("author", "Shakespeare"),
            Tuple.<String, Object>create("year", Integer.valueOf(1611)))).get().toString());
        assertEquals("title: Cymbeline, author: Shakespeare, year: 1611",
            (U.chain(listOfPlays).findWhere(asList(
            Tuple.<String, Object>create("author", "Shakespeare"),
            Tuple.<String, Object>create("year", Integer.valueOf(1611)))).item()).get().toString());
        assertEquals("title: Cymbeline, author: Shakespeare, year: 1611",
            U.findWhere(listOfPlays, asList(
            Tuple.<String, Object>create("author", "Shakespeare"),
            Tuple.<String, Object>create("author2", "Shakespeare"),
            Tuple.<String, Object>create("year", Integer.valueOf(1611)))).get().toString());
        class Book2 {
            public final String title;
            public final Integer year;
            private final String author;
            public Book2(final String title, final String author, final Integer year) {
                this.title = title;
                this.author = author;
                this.year = year;
            }
            public String getAuthor() {
                return author;
            }
            public String toString() {
                return "title: " + title + ", author: " + author + ", year: " + year;
            }
        }
        List<Book2> listOfPlays2 =
            new ArrayList<Book2>() { {
              add(new Book2("Cymbeline2", "Shakespeare", 1614));
              add(new Book2("Cymbeline", "Shakespeare", 1611));
              add(new Book2("The Tempest", "Shakespeare", 1611));
            } };
        assertEquals("title: Cymbeline, author: Shakespeare, year: 1611",
            U.findWhere(listOfPlays2, asList(
            Tuple.<String, Object>create("getAuthor", "Shakespeare"),
            Tuple.<String, Object>create("year", Integer.valueOf(1611)))).get().toString());
        assertEquals(Optional.<Book2>absent(),
            U.findWhere(listOfPlays2, asList(
            Tuple.<String, Object>create("getAuthor", "Shakespeare2"),
            Tuple.<String, Object>create("year", Integer.valueOf(1611)))));
    }