Sets the icon of the tooltip (which is in front of the text) to be the stock item indicated by stock_id with the size indicated by size. If stock_id is null, the image will be hidden.
a stock id, or null
a stock icon size (#GtkIconSize)
Deprecated: Use gtk.tooltip.Tooltip.setIconFromIconName instead.
Sets the icon of the tooltip (which is in front of the text) to be the stock item indicated by stock_id with the size indicated by size. If stock_id is null, the image will be hidden.