* Note that it is possible for get_uri to return NULL but for
* get_stream to work nonetheless, since not all GIOChannels connect to URIs.
*
- * Returns: Returns a string representing a URI, or NULL if no corresponding URI
- * can be constructed.
+ * Returns: (nullable): Returns a string representing a URI, or %NULL
+ * if no corresponding URI can be constructed.
*
* Since: 1.12
**/