src/main/java/io/netty/handler/codec/http/router/MethodlessRouter.java
public int size() {
        return first.routes().size() + other.routes().size() + last.routes().size();
    }
public int size() {
        return first.routes().size() + other.routes().size() + last.routes().size();
    }
Returns the number of routes in this router.