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)
const scope @trusted
bool
contains
Check if element is stored.
Parameter key may be non-immutable, for instance const(char)[] eventhough key type K is string.