Declare TopicTreeMessage and TopicTreeBigMessage prior to use (#1507)
Declare TopicTreeMessage and TopicTreeBigMessage prior to use (#1507)

Co-authored-by: Jun Woo Shin <3d4eb05101e94cc2a0f54b1eec6df70d9747809f@meta.com>
uNetworking/uWebSockets,uNetworking/uWebSockets,uNetworking/uWebSockets,uNetworking/uWebSockets