Don't refer to GtkContainer in the docs.
* @get_name: The getter corresponding to @set_name. Implement this
* if you implement @set_name.
* @add_child: Adds a child. The @type parameter can be used to
- * differentiate the kind of child. #GtkContainer implements this
- * to add add a child widget to the container, #GtkNotebook uses
+ * differentiate the kind of child. #GtkWidget implements this
+ * to add event controllers to the widget, #GtkNotebook uses
* the @type to distinguish between page labels (of type "page-label")
* and normal children.
* @set_buildable_property: Sets a property of a buildable object.