//! Stateful prediction support (MLState).
//!
//! Requires macOS 15+ / iOS 18+.
//! Covers FR-5.1, FR-5.2, FR-5.3.
use Retained;
/// A persistent state for stateful CoreML models (RNN, KV-cache, etc.).
///
/// State is mutated in-place during prediction and carries forward
/// across multiple predict calls.
unsafe