public NioAsyncSocketBuilder setDirectBuffers(boolean directBuffers) {
        verifyNotBuilt();

        this.directBuffers = directBuffers;
        return this;
    }
@Test
    public void test_setReceiveBufferIsDirect() {
        Reactor reactor = newReactor();
        NioAsyncSocketBuilder builder = (NioAsyncSocketBuilder) reactor.newAsyncSocketBuilder();

        builder.setDirectBuffers(false);
        assertFalse(builder.directBuffers);

        builder.setDirectBuffers(true);
        assertTrue(builder.directBuffers);
    }