/// @module std::core::hashmap_methods
/// Method definitions for HashMap<K, V>.
///
/// All methods delegate to VM PHF dispatch at runtime — they exist
/// only so the compiler can type-check calls.
extend HashMap<K, V> {
method get(key: K) -> Option<V> { self.get(key) }
method set(key: K, value: V) -> HashMap<K, V> { self.set(key, value) }
method has(key: K) -> bool { self.has(key) }
// Criterion F (2026-05-22) — `.includes(key)` standardizes the
// membership-naming surface across Array/Set/HashMap. Delegates to
// the PHF `has` handler via `method_registry.rs` (alias-shape).
method includes(key: K) -> bool { self.includes(key) }
method delete(key: K) -> HashMap<K, V> { self.delete(key) }
method keys() -> Vec<K> { self.keys() }
method values() -> Vec<V> { self.values() }
method entries() -> Vec<Vec<K>> { self.entries() }
method len() -> int { self.len() }
method isEmpty() -> bool { self.isEmpty() }
method map<U>(f: (K, V) => U) -> HashMap<K, U> { self.map(f) }
method filter(predicate: (K, V) => bool) -> HashMap<K, V> { self.filter(predicate) }
method forEach(f: (K, V) => void) -> void { self.forEach(f) }
}