Same as the preceding overload.
Declared in <bslstl_unorderedmap.h>
template<>
requires std::is_invocable_v<HASH, const KEY &> && bsl::IsStdAllocator_v<ALLOCATOR>
unordered_map(
std::initializer_list<value_type> values,
size_type initialNumBuckets,
HASH const& hashFunction,
ALLOCATOR const& basicAllocator);