* the string was not in the map (in which case it sets errno = ENOENT).
*
* This means that if you allocated a string (eg. using strdup()), you can
* free it here.
*
* Example:
* the string was not in the map (in which case it sets errno = ENOENT).
*
* This means that if you allocated a string (eg. using strdup()), you can
* free it here.
*
* Example: