Collections.Map

Purpose

Key/value associative container with explicit semantics.

Candidate surface

• Map<TKey, TValue>.Set(TKey key, TValue value) -> unit
• Map<TKey, TValue>.TryGet(TKey key) -> Result<TValue, MapError>
• Map<TKey, TValue>.ContainsKey(TKey key) -> bool

Notes

• Hashing/equality rules must be deterministic.
• Iteration order guarantees should be documented explicitly.