[ NoAccessorMethod ]
[ Version ( since = "2.16" ) ]
public bool secondary_icon_sensitive { get; set; }

Whether the secondary icon is sensitive.

An insensitive icon appears grayed out. GTK+ does not emit the icon_press and icon_release signals and does not allow DND from insensitive icons.

An icon should be set insensitive if the action that would trigger when clicked is currently not available.