Sets the tooltip text to be used as tooltip for the arrow button which pops up the menu. See ToolItem.setTooltipText for setting a tooltip on the whole gtk.MenuToolButton
text to be used as tooltip text for button’s arrow button
2.12
Sets the tooltip text to be used as tooltip for the arrow button which pops up the menu. See ToolItem.setTooltipText for setting a tooltip on the whole gtk.MenuToolButton