location to store the padding for the top of the widget, or %NULL
location to store the padding for the bottom of the widget, or %NULL
location to store the padding for the left of the widget, or %NULL
location to store the padding for the right of the widget, or %NULL
Deprecated: Use #GtkWidget alignment and margin properties
2.4
Gets the padding on the different sides of the widget. See gtk_alignment_set_padding ().