legacy library
Classes
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  ChangeNotifierProvider<
NotifierT extends ChangeNotifier?>  - Creates a ChangeNotifier and exposes its current state.
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  ChangeNotifierProviderFamily<
NotifierT extends ChangeNotifier?, ArgT>  - The Family of ChangeNotifierProvider.
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  StateController<
StateT>  - A StateNotifier that allows modifying its state from outside.
 - 
  StateNotifier<
T>  - An observable class that stores a single immutable state.
 - 
  StateNotifierProvider<
NotifierT extends StateNotifier< ValueT> , ValueT> - Creates a StateNotifier and exposes its current state.
 - 
  StateNotifierProviderFamily<
NotifierT extends StateNotifier< ValueT> , ValueT, ArgT> - The Family of StateNotifierProvider.
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  StateProvider<
ValueT>  - A provider that exposes a value that can be modified from outside.
 - 
  StateProviderFamily<
ValueT, ArgT>  - The Family of StateProvider.