TOnCustomSelectionMenuClick typedef
TOnCustomSelectionMenuClick =
dynamic Function(int index, TSelectionEntity customMenuItem, TSetCustomSelectionParams customSelectionParams)
自定义类型的 menu 被点击的回调，
index 点击位置，
customMenuItem 自定义筛选 menu 原始数据，
customSelectionParams 开放给外部回调给函数，用于更新自定义筛选参数，触发TOnSelectionChanged。
Implementation
typedef TOnCustomSelectionMenuClick = Function(int index, TSelectionEntity customMenuItem, TSetCustomSelectionParams customSelectionParams);