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 multimap, or the end(index) iterator if the indexed bucket is empty. The behavior is undefined unless index < bucket_count().
Declared in <bslstl_unorderedmultimap.h>
unordered_multimap<KEY, VALUE, HASH, EQUAL, ALLOCATOR>::const_local_iterator
cbegin(size_type index) const;