begin overloads
Declared in <bslstl_map.h>
Return an iterator providing modifiable access to the first value_type object in the ordered sequence of value_type objects maintained by this map, or the end iterator if this map is empty.
iterator
begin() noexcept;Return an iterator providing non-modifiable access to the first value_type object in the ordered sequence of value_type objects maintained by this map, or the end iterator if this map is empty.
const_iterator
begin() const noexcept;