Retrieve an extension identified by a key (string) from the specified list of video modes.
#include <wfdqnx/wfdcfg.h>
struct wfdcfg_keyval* wfdcfg_mode_list_get_extension(const struct wfdcfg_mode_list *list,
const char *key)
A handle to the list whose extension(s) you are retrieving
Identifier of the extension to retrieve
The extension is valid between the time you create and destroy the list.
Pointer to wfdcfg_keyval if the extension was found; NULL if the extension was not found. It's considered acceptable for a list to have no extensions.