(nullable) and (optional) were missing on lookup()'s out parameters,
which caused the rust bindings for the function to not work. Due to the
missing (nullable), it would return a Result<(GString, MutableTree), _>,
not a Result<(Option<GString>, Option<MutableTree>), _>, which led to
panics.
* ostree_mutable_tree_lookup:
* @self: Tree
* @name: name
- * @out_file_checksum: (out) (transfer full): checksum
- * @out_subdir: (out) (transfer full): subdirectory
+ * @out_file_checksum: (out) (transfer full) (nullable) (optional): checksum
+ * @out_subdir: (out) (transfer full) (nullable) (optional): subdirectory
* @error: a #GError
*/
gboolean