//! Grouping and aggregation functionality for OptimizedDataFrame
//!
//! This module is organized into four sub-modules:
//! - `types`: Core types, enums, and structs
//! - `grouping`: Group creation logic and parallel grouping operations
//! - `aggregation`: Core aggregation implementations
//! - `operations`: Transform, filter, and convenience methods
// Re-export main types for convenience
pub use ;
// The grouping methods are implemented directly on OptimizedDataFrame via the grouping module
// The aggregation and operations methods are implemented on GroupBy via their respective modules