diff --git a/services/dns/api_default_test.go b/services/dns/api_default_test.go
index 16cf6b20a..255e69ae5 100644
--- a/services/dns/api_default_test.go
+++ b/services/dns/api_default_test.go
@@ -25,9 +25,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService CloneZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/clone"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -81,9 +81,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService CreateLabel", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/labels"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -137,9 +137,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService CreateMoveCode", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/move-code"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -192,9 +192,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService CreateRecordSet", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/rrsets"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -248,7 +248,7 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService CreateZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -301,11 +301,11 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService DeleteLabel", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/labels/{key}"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
-		keyValue := "key"
+		keyValue := "key-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"key"+"}", url.PathEscape(ParameterValueToString(keyValue, "key")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -359,9 +359,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService DeleteMoveCode", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/move-code"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -414,11 +414,11 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService DeleteRecordSet", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/rrsets/{rrSetId}"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
-		rrSetIdValue := "rrSetId"
+		rrSetIdValue := "rrSetId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"rrSetId"+"}", url.PathEscape(ParameterValueToString(rrSetIdValue, "rrSetId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -472,9 +472,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService DeleteZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -527,9 +527,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService ExportRecordSets", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/export"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -583,11 +583,11 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService GetRecordSet", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/rrsets/{rrSetId}"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
-		rrSetIdValue := "rrSetId"
+		rrSetIdValue := "rrSetId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"rrSetId"+"}", url.PathEscape(ParameterValueToString(rrSetIdValue, "rrSetId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -641,9 +641,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService GetZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -696,9 +696,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService ImportRecordSets", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/import"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -752,9 +752,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService ListLabels", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/labels"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -807,9 +807,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService ListRecordSets", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/rrsets"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -862,7 +862,7 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService ListZones", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -914,7 +914,7 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService MoveZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/move-zone"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -967,11 +967,11 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService PartialUpdateRecord", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/rrsets/{rrSetId}/records"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
-		rrSetIdValue := "rrSetId"
+		rrSetIdValue := "rrSetId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"rrSetId"+"}", url.PathEscape(ParameterValueToString(rrSetIdValue, "rrSetId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -1026,11 +1026,11 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService PartialUpdateRecordSet", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/rrsets/{rrSetId}"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
-		rrSetIdValue := "rrSetId"
+		rrSetIdValue := "rrSetId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"rrSetId"+"}", url.PathEscape(ParameterValueToString(rrSetIdValue, "rrSetId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -1085,9 +1085,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService PartialUpdateZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -1141,11 +1141,11 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService RestoreRecordSet", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/rrsets/{rrSetId}/restores"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
-		rrSetIdValue := "rrSetId"
+		rrSetIdValue := "rrSetId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"rrSetId"+"}", url.PathEscape(ParameterValueToString(rrSetIdValue, "rrSetId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -1199,9 +1199,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService RestoreZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/restores"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -1254,9 +1254,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService RetrieveZone", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/retrieve"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -1309,9 +1309,9 @@ func Test_dns_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService ValidateMoveCode", func(t *testing.T) {
 		_apiUrlPath := "/v1/projects/{projectId}/zones/{zoneId}/move-code-validation"
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		zoneIdValue := "zoneId"
+		zoneIdValue := "zoneId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"zoneId"+"}", url.PathEscape(ParameterValueToString(zoneIdValue, "zoneId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
diff --git a/services/dns/client.go b/services/dns/client.go
index 557e680af..0df35c911 100644
--- a/services/dns/client.go
+++ b/services/dns/client.go
@@ -308,7 +308,7 @@ func (c *APIClient) prepareRequest(
 	var body *bytes.Buffer
 
 	// Detect postBody type and post.
-	if postBody != nil {
+	if !IsNil(postBody) {
 		contentType := headerParams["Content-Type"]
 		if contentType == "" {
 			contentType = detectContentType(postBody)