pub fn ws_orderbook_update_from_engine_update(
orderbook_update_contract_units_raw: &OrderbookUpdate,
option_token_address: Option<WalletAddress>,
) -> WsOrderbookUpdatepub fn ws_orderbook_update_from_engine_update(
orderbook_update_contract_units_raw: &OrderbookUpdate,
option_token_address: Option<WalletAddress>,
) -> WsOrderbookUpdate