Sets the icon of the tooltip (which is in front of the text) to be the icon indicated by icon_name with the size indicated by size. If icon_name is NULL, the image will be hidden.
an icon name, or NULL
a stock icon size (gtk.IconSize)
2.14
Sets the icon of the tooltip (which is in front of the text) to be the icon indicated by icon_name with the size indicated by size. If icon_name is NULL, the image will be hidden.