Returns the #GtkIconFactory defined to be in use for path, or null if none is defined.
Returns the style settings affecting a widget defined by path, or null if provider doesn’t contemplate styling path.
Looks up a widget style property as defined by provider for the widget represented by path.
GtkStyleProvider is an interface used to provide style information to a #GtkStyleContext. See gtk.style_context.StyleContext.addProvider and gtk.style_context.StyleContext.addProviderForScreen.