fn synthesize_fixed_surface_snapshot(
orderbooks: &HashMap<String, OrderBook>,
vol_oracle: &SharedVolOracle,
statuses: &[VolOracleStatus],
underlying: &str,
now_ms: i64,
) -> Option<VolSurfaceSnapshot>fn synthesize_fixed_surface_snapshot(
orderbooks: &HashMap<String, OrderBook>,
vol_oracle: &SharedVolOracle,
statuses: &[VolOracleStatus],
underlying: &str,
now_ms: i64,
) -> Option<VolSurfaceSnapshot>