A lifecycle interface that allows re-using an existing component instance.
Component classes should
implement this if they will be navigated to as
part of a route definition and would like to determine whether an instance
should be cached for reuse between activations.
RouterState current, RouterState next) → Future< bool>
- Called by the router before the route is deactivated, so that the component instance can notify the router if it should be cached for reuse. [...]
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
) → String
Returns a string representation of this object.