buildItemView method
Implementation
@override
Widget buildItemView(E? item, int position) {
var holder = ItemHolder(item, position, this);
// [HolderPort]与上层建立视图进行绑定
state?._addHolder(position, holder);
return GestureWrapper(
item,
position,
gestureItem: _gestureCallback,
child: holder,
eventsBinder: this,
);
}