ExtBoolname
const char *capname = ExtBoolname(tp, i, boolcodes);
const char *capname = ExtBoolname(tp, i, boolnames);
n, ExtBoolname(term, (int) n, boolnames), str);
n, ExtBoolname(term, (int) n, boolnames));
name = ExtBoolname(tp, (int) i, bool_names);
name = ExtBoolname(tterm, (int) i, bool_names);
check_user_capability_type(ExtBoolname(tp, (int) j, strnames), BOOLEAN);