unibi_count_ext_bool, unibi_count_ext_num, unibi_count_ext_str

 #include <unibilium.h>
 size_t unibi_count_ext_bool(const unibi_term *ut);
 size_t unibi_count_ext_num(const unibi_term *ut);
 size_t unibi_count_ext_str(const unibi_term *ut);

These functions count the number of extended (i.e. user specified) capabilities of the respective type in ut.

The number of extended capabilities.

unibilium.h(3)