@Override
    public final String getServiceAuthority() {
        return this.name;
    }
Checks whether this resolver is active. E.g. {@code #start} has been called, but not {@code #shutdown()}.

@return True, if there is a listener attached. False, otherwise.
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/nameresolver/DiscoveryClientNameResolver.java