static <T> StreamMessage<T> of(T obj1, T obj2, T obj3) {
        requireNonNull(obj1, "obj1");
        requireNonNull(obj2, "obj2");
        requireNonNull(obj3, "obj3");
        return new ThreeElementFixedStreamMessage<>(obj1, obj2, obj3);
    }
Creates a new {@link StreamMessage} that will publish the three {@code obj1}, {@code obj2} and
{@code obj3}.
core/src/main/java/com/linecorp/armeria/common/stream/StreamMessage.java