gtk:status-icon-set-from-stock (icon stock-id)

icon -- a gtk:status-icon object
stock-id -- a string with the stock ID

Makes the status icon display the stock icon with the ID stock-id. See the gtk:status-icon-new-from-stock function for details. The gtk:status-icon-set-from-stock function has been deprecated since version 3.10 and should not be used in newly written code.