public static Integer getTimeout() {
        return (Integer) CONTEXT_HOLDER.get(KEY_TIMEOUT);
    }
@Test
    public void testGetTimeout() {
        RootContext.setTimeout(100);
        assertThat(RootContext.getTimeout()).isEqualTo(100);
        RootContext.setTimeout(null);
        assertThat(RootContext.getTimeout()).isEqualTo(null);
    }