* Gets the child of @grid whose area covers the grid
* cell whose upper left corner is at @left, @top.
*
- * Returns: (transfer none): the child at the given position, or %NULL
+ * Returns: (transfer none) (nullable): the child at the given position, or %NULL
*
* Since: 3.2
*/
* If @_index is negative or larger than the number of items in the
* list, %NULL is returned.
*
- * Returns: (transfer none): the child #GtkWidget or %NULL
+ * Returns: (transfer none) (nullable): the child #GtkWidget or %NULL
*
* Since: 3.10
*/
* in a #GtkListBoxUpdateHeaderFunc to see if there is a header
* set already, and if so to update the state of it.
*
- * Returns: (transfer none): the current header, or %NULL if none
+ * Returns: (transfer none) (nullable): the current header, or %NULL if none
*
* Since: 3.10
*/
/**
* GtkWindow:set-focus:
* @window: the window which received the signal
- * @widget: the newly focused widget (or %NULL for no focus)
+ * @widget: (nullable): the newly focused widget (or %NULL for no focus)
*
* This signal is emitted whenever the currently focused widget in
* this window changes.