- * * `field_val` is `NULL`.
- * * The type of `field_val` is not
- * `LTTNG_EVENT_FIELD_VALUE_TYPE_STRING`.
+ * `LTTNG_EVENT_FIELD_VALUE_STATUS_OK`:
+ * Success.
+ *
+ * `LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID`:
+ * * `field_val` is `NULL`.
+ * * The type of `field_val` is not
+ * `LTTNG_EVENT_FIELD_VALUE_TYPE_STRING`.