Function value_container 

pub fn value_container<T, V>(
    child: V,
    value_update: impl Fn() -> T + 'static,
) -> ValueContainer<T>
where
    T: 'static,
    V: IntoView + 'static,

A wrapper around another View that has value updates.

A ValueContainer is useful for wrapping another View. This is to provide the on_update method which can notify when the view’s internal value was get changed