Type Alias MapGetValuePtrFn 

pub type MapGetValuePtrFn = for<'map, 'key> unsafe fn(map: PtrConst<'map>, key: PtrConst<'key>) -> Option<PtrConst<'map>>;

Get pointer to a value for a given key, returns None if not found

Safety

The map parameter must point to aligned, initialized memory of the correct type.