added missing file

modules/swagger-codegen/src/main/resources/go/api_response.mustache

@@ -0,0 +1,24 @@
+package swagger
+
+import (
+  "net/http"
+)
+
+
+type ApiResponse struct {
+  *http.Response
+  
+  Message  string  `json:"message,omitempty"`
+}
+
+func NewApiResponse(r *http.Response) *ApiResponse {
+  response := &ApiResponse{Response: r}
+
+  return response
+}
+
+func NewApiResponseWithError(errorMessage string) *ApiResponse {
+  response := &ApiResponse{Message: errorMessage}
+
+  return response
+}

samples/client/petstore/go/go-petstore/model_api_response.go

@@ -0,0 +1,14 @@
+package swagger
+
+import (
+)
+
+
+type ModelApiResponse struct {
+    
+    Code  int32  `json:"code,omitempty"`
+    
+    Type_  string  `json:"type,omitempty"`
+    
+    Message  string  `json:"message,omitempty"`
+}