gtk/gtk_deprecated_since_3_12.go
func (v *Widget) SetMarginLeft(margin int) {
	C.gtk_widget_set_margin_left(v.native(), C.gint(margin))
}
func (v *Widget) SetMarginLeft(margin int) {
	C.gtk_widget_set_margin_left(v.native(), C.gint(margin))
}
// SetMarginLeft is a wrapper around gtk_widget_set_margin_left().