Return a const reverse iterator to the last element, or crend if empty.
Declared in <bslstl_map.h>
map<KEY, VALUE, COMPARATOR, ALLOCATOR>::const_reverse_iterator
crbegin() const noexcept;Return a reverse iterator providing non-modifiable access to the last value_type object in the ordered sequence of value_type objects maintained by this map, or crend if this map is empty.
const reverse iterator to the last element, or crend()