XkbKeyType returns a pointer to the key type in the types vector of the client map in xkb corresponding to the given keycode and group index.
typedef struct { /* Key Type */
XkbModsRec mods; /* modifiers used to compute shift
level */
unsigned char num_levels; /* total # shift levels, do not
modify directly */
unsigned char map_count; /* # entries in map, preserve (if
non-NULL) */
XkbKTMapEntryPtr map; /* vector of modifiers for each
shift level */
XkbModsPtr preserve; /* mods to preserve for corresponding
map entry */
Atom name; /* name of key type */
Atom * level_names; /* array of names of each shift
level */
} XkbKeyTypeRec, *XkbKeyTypePtr;