Function on_action_with_context 

pub fn on_action_with_context<State, Action, Context, OnAction, Res, ChildView, ChildAction>(
    on_action: OnAction,
    child: ChildView,
) -> OnActionWithContext<State, Action, Context, OnAction, Res, ChildView, ChildAction>
where
    Context: ViewPathTracker,
    OnActionWithContext<State, Action, Context, OnAction, Res, ChildView, ChildAction>: View<State, Action, Context>,
    OnAction: Fn(&mut State, &mut Res, ChildAction) -> Action,

Operate on an environment value when a child view returns an action.

This is an interim solution whilst we design APIs for environment manipulation.

The first argument on_action is the function which will be ran in this case. The arguments are the app’s state, the specified resource and the action returned by the child.