Loads a loadable icon. For the asynchronous version of this function, see gio.loadable_icon.LoadableIcon.loadAsync.
an integer.
a location to store the type of the loaded icon, null to ignore.
optional #GCancellable object, null to ignore.
a #GInputStream to read the icon from.
Loads a loadable icon. For the asynchronous version of this function, see gio.loadable_icon.LoadableIcon.loadAsync.