public Set<Long> getSkipTokens() {
        return this.skipTokens;
    }
@Test
    public void tesSkipTokens() {
        Set<Long> skipTokens = embedder.getSkipTokens();
        assertTrue(skipTokens.contains(999L));
        assertTrue(skipTokens.contains(1000L));
        assertTrue(skipTokens.contains(1001L));
        assertTrue(skipTokens.contains(1002L));
        assertTrue(skipTokens.contains(1003L));
        assertTrue(skipTokens.contains(1031L));
    }