- int (*visible)(struct Client *); /* whether or not to display the capability. set to NULL or true return value = displayed */
- const char *(*data)(struct Client *); /* any custom data for the capability. set to NULL or return NULL = no data */
+ bool (*visible)(struct Client *); /* whether or not to display the capability. set to NULL or true return value = displayed */
+ const char *(*data)(struct Client *); /* any custom data for the capability. set to NULL or return NULL = no data */