update_property

Updates a list of accessible properties.

See the [enum@Gtk.AccessibleProperty] documentation for the value types of accessible properties.

This function should be called by `GtkWidget` types whenever an accessible property change must be communicated to assistive technologies.

Example: ```c value = gtk_adjustment_get_value (adjustment); gtk_accessible_update_property (GTK_ACCESSIBLE (spin_button), GTK_ACCESSIBLE_PROPERTY_VALUE_NOW, value, -1); ```

Parameters:

this	a `GtkAccessible`
...	a list of property and value pairs, terminated by -1
first_property	the first `GtkAccessibleProperty`