Return a local iterator providing non-modifiable access to the first value_type object (in the sequence of value_type objects) of the bucket having the specified index in the array of buckets maintained by this unordered multiset, or the end(index) otherwise. The behavior is undefined unless 'index < bucket_count()'.
Declared in <bslstl_unorderedmultiset.h>
unordered_multiset<KEY, HASH, EQUAL, ALLOCATOR>::const_local_iterator
cbegin(size_type index) const;