for tool_item.
ToolItem.getReliefStyle
gtk.types.ReliefStyle getReliefStyle()Returns the relief style of tool_item. See [gtk.button.Button.setRelief]. Custom subclasses of #GtkToolItem should call this function in the handler of the #GtkToolItem::toolbar_reconfigured signal to find out the relief style of buttons.
Returns
a #GtkReliefStyle indicating the relief style used