diff --git a/default.go b/default.go
index 2cda652..0e9364a 100644
--- a/default.go
+++ b/default.go
@@ -57,6 +57,7 @@ func (e DefaultError) BodyBytes() (body []byte) {
 
 type DefaultRequestBuilder struct {
 	requestBuilder RequestBuilder
+	prototype      PrototypeRequestBuilder
 	allowedMethods *[]string
 	header         struct {
 		*Header
@@ -72,7 +73,7 @@ type DefaultRequestBuilder struct {
 	}
 }
 
-func NewDefaultRequestBuilder(rb RequestBuilder, am *[]string, h *Header, hf header, v *Values, vf values, b *Body, bf body) DefaultRequestBuilder {
+func NewDefaultRequestBuilder(rb RequestBuilder, rbp PrototypeRequestBuilder, am *[]string, h *Header, hf header, v *Values, vf values, b *Body, bf body) DefaultRequestBuilder {
 	if am == nil {
 		amd := make([]string, 0)
 		am = &amd
@@ -97,6 +98,7 @@ func NewDefaultRequestBuilder(rb RequestBuilder, am *[]string, h *Header, hf hea
 	}
 	return DefaultRequestBuilder{
 		requestBuilder: rb,
+		prototype:      rbp,
 		allowedMethods: am,
 		header: struct {
 			*Header
@@ -122,6 +124,10 @@ func NewDefaultRequestBuilder(rb RequestBuilder, am *[]string, h *Header, hf hea
 	}
 }
 
+func (rb *DefaultRequestBuilder) Prototype() PrototypeRequestBuilder {
+	return rb.prototype
+}
+
 func (rb *DefaultRequestBuilder) Allowed(method string) (errRes ErrorResponse) {
 	var ok bool
 	for _, m := range *rb.allowedMethods {
@@ -158,8 +164,9 @@ func (rb *DefaultRequestBuilder) Values(values Values) (errRes ErrorResponse) {
 }
 
 type DefaultResponse struct {
-	response Response
-	header   struct {
+	response  Response
+	prototype PrototypeResponse
+	header    struct {
 		*Header
 		fields header
 	}
@@ -169,7 +176,7 @@ type DefaultResponse struct {
 	}
 }
 
-func NewDefaultResponse(r Response, h *Header, hf header, b *Body, bf body) DefaultResponse {
+func NewDefaultResponse(r Response, rp PrototypeResponse, h *Header, hf header, b *Body, bf body) DefaultResponse {
 	if h == nil || hf == nil {
 		hd := make(Header)
 		h = &hd
@@ -183,7 +190,8 @@ func NewDefaultResponse(r Response, h *Header, hf header, b *Body, bf body) Defa
 		bf = &bfd
 	}
 	return DefaultResponse{
-		response: r,
+		response:  r,
+		prototype: rp,
 		header: struct {
 			*Header
 			fields header
@@ -201,6 +209,10 @@ func NewDefaultResponse(r Response, h *Header, hf header, b *Body, bf body) Defa
 	}
 }
 
+func (r *DefaultResponse) Prototype() PrototypeResponse {
+	return r.prototype
+}
+
 func (r *DefaultResponse) Header() (header Header) {
 	if r.header.Header == nil {
 		r.header.Header.Parse(r.header.fields)