/**
* pango_context_get_metrics:
* @context: a #PangoContext
- * @desc: a #PangoFontDescription structure. %NULL means that the font
- * description from the context will be used.
- * @language: language tag used to determine which script to get the metrics
- * for. %NULL means that the language tag from the context will
- * be used. If no language tag is set on the context, metrics
- * for the default language (as determined by
- * pango_language_get_default()) will be returned.
+ * @desc: (allow-none): a #PangoFontDescription structure. %NULL means that the
+ * font description from the context will be used.
+ * @language: (allow-none): language tag used to determine which script to get
+ * the metrics for. %NULL means that the language tag from the context
+ * will be used. If no language tag is set on the context, metrics
+ * for the default language (as determined by pango_language_get_default())
+ * will be returned.
*
* Get overall metric information for a particular font
* description. Since the metrics may be substantially different for