bind method
Resolves every route parameter named param through resolver after
the route's RunsBeforeBindings middleware (authentication, rate
limits) and before the rest; the result is available via
request.binding<T>(). With orFail, a null result renders a 404.
Implementation
void bind(String param, RouteBinder resolver, {bool orFail = true}) =>
_binders[param] = _Binder(resolver, orFail: orFail);