struct HybridHashMap(K, V = void, alias hasher = hashOf, string keyEqualPred = defaultKeyEqualPredOf!(K), Allocator = Mallocator, BorrowCheckFlag borrowCheckFlag = BorrowCheckFlag.no, uint linearSearchMaxSize = 64, PrimeCapacityFlag primeCapacityFlag = PrimeCapacityFlag.no)
Numerator for grow scale.