Basic classes for widget support for the Kiwi Framework
| Class | ProxyWidgetMixin | This class is a mixin that provide a common interface for KiwiWidgets. |
| Class | ValidatableProxyWidgetMixin | Class used by some Kiwi Widgets that need to support mandatory input and validation features such as custom validation and data-type validation. |
| Class | _PixbufConverter | Undocumented |