Assign to this object the value resulting from first clearing this multiset and then inserting each value_type object in the specified values initializer list and return a reference providing modifiable access to this object. This method requires that the (template parameter) type KEY be copy-insertable into this multiset (see {Requirements on KEY}).
Declared in <bslstl_multiset.h>
multiset<KEY, COMPARATOR, ALLOCATOR>&
operator=(std::initializer_list<KEY> values);