+/*
+ * bt_ctf_field_variant_get_tag: get the tag field of a variant.
+ *
+ * Return the variant's associated tag field. This function, unlike
+ * bt_ctf_field_variant_get_field(), does not create any field; it
+ * returns NULL if there's no current selected field yet (and, thus, no
+ * associated tag).
+ *
+ * @param variant Variant field instance.
+ *
+ * Returns a field instance (enumeration) on success, NULL on error or when
+ * there is no currently selected field.
+ */
+extern struct bt_ctf_field *bt_ctf_field_variant_get_tag(
+ struct bt_ctf_field *variant);
+