slotBuilders property
插槽构建器映射，允许自定义各个插槽的构建方式
Slot builder map, allowing customization of how each slot is built
支持两种签名：
- SlotWidgetBuilder (已废弃):
Widget Function(BuildContext context) - SlotWidgetBuilderWithController:
Widget Function(BuildContext context, AliPlayerWidgetController controller)
Supports two signatures:
- SlotWidgetBuilder (deprecated):
Widget Function(BuildContext context) - SlotWidgetBuilderWithController:
Widget Function(BuildContext context, AliPlayerWidgetController controller)
推荐使用 SlotWidgetBuilderWithController 以确保全屏模式下正常工作。
Recommend using SlotWidgetBuilderWithController for fullscreen mode support.
Implementation
final Map<SlotType, Function?> slotBuilders;