+extern bt_field_class_variant_option *
+bt_field_class_variant_borrow_option_by_index(
+ bt_field_class *field_class, uint64_t index);
+
+extern bt_field_class_variant_option *
+bt_field_class_variant_borrow_option_by_name(
+ bt_field_class *field_class, const char *name);
+
+extern bt_value *bt_field_class_variant_option_borrow_user_attributes(
+ bt_field_class_variant_option *option);
+
+extern void bt_field_class_variant_option_set_user_attributes(
+ bt_field_class_variant_option *option,
+ const bt_value *user_attributes);
+