Return a local iterator providing 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>::local_iterator
begin(size_type index);