If a key equivalent to the specified key already exists in this map, assign the specified obj to the value associated with that key, and return an iterator referring to the existing item. Otherwise, insert into this map a newly-created value_type object, constructed from (key, std::forward<BDE_OTHER_TYPE>(obj)...)), and return an iterator referring to the newly-created entry. Use the specified hint as a starting point for checking to see if the key is already in the map.
Declared in <bslstl_map.h>
template<class BDE_OTHER_TYPE>
iterator
insert_or_assign(
const_iterator hint,
TimeInterval const& key,
BDE_OTHER_TYPE&& obj);