public Pixbuf? render_icon (string stock_id, IconSize size, string? detail)
Warning: render_icon is deprecated since "3.0".
A convenience function that uses the theme settings for this to look up
stock_id and render it
to a pixbuf.
Use render_icon_pixbuf instead.
stock_id should be a stock icon ID such as STOCK_OPEN or
size should be a size such as
detail should be a string that identifies the widget or code
doing the rendering, so that theme engines can special-case rendering for that widget or code.
a stock ID
a stock size (IconSize). A size of `(GtkIconSize)-1` means render at the size of the source and don’t scale (if there are multiple source sizes, GTK+ picks one of the available sizes).
render detail to pass to theme engine
a new pixbuf, or null if the stock ID wasn’t known