Function route_changed_fn_name 

pub fn route_changed_fn_name() -> &'static str

__lgx_route_changed() — deliver a move of the location to every live instance of every component with a When the route changes: handler. The page registers it with the host once, at start (onRoute), and a turn whose own Navigate to moved the location calls it at its epilogue, so a placed component hears the move exactly as a mounted one does.