async fn serialize_delta(network_graph: Arc<NetworkGraph<TestLogger>>, last_sync_timestamp: u32, consider_intermediate_updates: bool) -> SerializedResponse {
let (client, connection) = lookup::connect_to_db().await;
async fn serialize_delta(network_graph: Arc<NetworkGraph<TestLogger>>, last_sync_timestamp: u32, consider_intermediate_updates: bool) -> SerializedResponse {
let (client, connection) = lookup::connect_to_db().await;