struct OpenHashMap(K, V = void, alias hasher = hashOf, string keyEqualPred = defaultKeyEqualPredOf!(K), alias Allocator = Mallocator.instance, bool borrowChecked = false, bool useSmallLinearSearch = true, bool usePrimeCapacity = false)
ref const return @trusted @nogc
const(K)
getKeyRef
Get reference to key-part of stored element at key, if present, otherwise return defaultKey.
Used to implement caching inside the key part of a map.