func (w *logResponseWritter) Size() int {
	return w.size
}
Size provides an easy way to retrieve the response size in bytes
package lars
import (
	"fmt"
	"net/http"
	"reflect"
	"strconv"
	"testing"
	. "gopkg.in/go-playground/assert.v1"
)
type logResponseWritter struct {
	status int
	size   int
	http.ResponseWriter
}
func (w *logResponseWritter) Status() int {
	return w.status
}