[ CCode ( cname = "G_MENU_ATTRIBUTE_ICON" ) ]
[ Version ( since = "2.38" ) ]
public const string ATTRIBUTE_ICON

The menu item attribute which holds the icon of the item.

The icon is stored in the format returned by serialize.

This attribute is intended only to represent 'noun' icons such as favicons for a webpage, or application icons. It should not be used for 'verbs' (ie: stock icons).