@Override
    public CircuitBreakerRpcClientBuilder recover(BiFunction<? super ClientRequestContext, ? super RpcRequest,
            ? extends RpcResponse> fallback) {
        return (CircuitBreakerRpcClientBuilder) super.recover(fallback);
    }
Returns a newly-created decorator that decorates an {@link RpcClient} with a new
{@link CircuitBreakerRpcClient} based on the properties of this builder.
core/src/main/java/com/linecorp/armeria/client/circuitbreaker/CircuitBreakerRpcClientBuilder.java