Retrieves the GIcon used for the icon.
%NULL will be returned if there is no icon or if the icon was set by some other method (e.g., by GdkPaintable or icon name).
Icon position
A GIcon, or %NULL if no icon is set or if the icon is not a GIcon
See Implementation
Retrieves the GIcon used for the icon.
%NULL will be returned if there is no icon or if the icon was set by some other method (e.g., by GdkPaintable or icon name).