Function save_engine 

pub fn save_engine(
    engine: &OptimizedDiscoveryEngine,
    path: &Path,
    options: &PersistenceOptions,
) -> Result<()>

Save the OptimizedDiscoveryEngine state to a file

Arguments

• engine - The engine to save
• path - Path to save to (will be created/overwritten)
• options - Persistence options (compression, formatting)

Example

let engine = OptimizedDiscoveryEngine::new(OptimizedConfig::default());
save_engine(&engine, Path::new("engine_state.json"), &PersistenceOptions::default())?;