Registers a property so it can be used in the CSS file format. This function is the low-level equivalent of ThemingEngine.registerProperty, if you are implementing a theming engine, you want to use that function instead.
parsing function to use, or NULL
the gobject.ParamSpec for the new property
Deprecated: Code should use the default properties provided by CSS.
3.0
Registers a property so it can be used in the CSS file format. This function is the low-level equivalent of ThemingEngine.registerProperty, if you are implementing a theming engine, you want to use that function instead.