@Test
    void checkEventLoopNonBlocking() throws Exception {
        final Future<Boolean> submit = CommonPools.workerGroup().submit(Schedulers::isInNonBlockingThread);
        assertThat(submit.get()).isTrue();
    }
Verifies that the current thread is registered a non-blocking thread via {@code ReactorNonBlockingUtil}.
reactor3/src/test/java/com/linecorp/armeria/common/reactor3/EventLoopNonBlockingTest.java