public void testRemove() throws Exception {
        list.addLast(null);
        list.addLast("1");
        list.addLast("2");
        assertThat(list.remove("3"), is(not(true)));
        assertThat(list.remove("1"), is(true));
        assertThat(list.remove(null), is(true));
        list.clear();
        list.addLast("1");
        list.addLast("2");
        list.addLast("3");
        list.remove(1);

     *            A disposable resource. Must not be {@literal null}.
     */
    public static synchronized void add(final Disposable disposable) {
        assertArgumentNotNull("disposable", disposable);
        disposables.addLast(disposable);
    }

    /**
     * Registers a disposable resource at the beginning.
     * <p>

        final TimeoutTask task = new TimeoutTask(timeoutTarget, timeout, permanent);
        timeoutTaskList.addLast(task);
        start();
        return task;
    }

    /**
     * Returns the number of managed {@link TimeoutTask}.
     *
     * @return the number of managed {@link TimeoutTask}
     */