From b728756b839b4f0ce592c328da3a5c4c3a7a97eb Mon Sep 17 00:00:00 2001
From: "gcf-owl-bot[bot]" <78513119+gcf-owl-bot[bot]@users.noreply.github.com>
Date: Mon, 7 Jun 2021 20:34:05 +0000
Subject: [PATCH] fix: GoogleAdsError missing using generator version after
 1.3.0 (#122)

[PR](https://github.com/googleapis/gapic-generator-typescript/pull/878) within
updated gapic-generator-typescript version 1.4.0

Committer: @summer-ji-eng
PiperOrigin-RevId: 375759421

Source-Link: https://github.com/googleapis/googleapis/commit/95fa72fdd0d69b02d72c33b37d1e4cc66d4b1446

Source-Link: https://github.com/googleapis/googleapis-gen/commit/f40a34377ad488a7c2bc3992b3c8d5faf5a15c46
---
 packages/google-cloud-dialogflow-cx/src/v3/agents_client.ts     | 2 ++
 .../google-cloud-dialogflow-cx/src/v3/entity_types_client.ts    | 2 ++
 .../google-cloud-dialogflow-cx/src/v3/environments_client.ts    | 2 ++
 .../google-cloud-dialogflow-cx/src/v3/experiments_client.ts     | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3/flows_client.ts      | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3/intents_client.ts    | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3/pages_client.ts      | 2 ++
 .../src/v3/security_settings_service_client.ts                  | 2 ++
 .../src/v3/session_entity_types_client.ts                       | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3/sessions_client.ts   | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3/test_cases_client.ts | 2 ++
 .../src/v3/transition_route_groups_client.ts                    | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3/versions_client.ts   | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3/webhooks_client.ts   | 2 ++
 .../google-cloud-dialogflow-cx/src/v3beta1/agents_client.ts     | 2 ++
 .../src/v3beta1/entity_types_client.ts                          | 2 ++
 .../src/v3beta1/environments_client.ts                          | 2 ++
 .../src/v3beta1/experiments_client.ts                           | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3beta1/flows_client.ts | 2 ++
 .../google-cloud-dialogflow-cx/src/v3beta1/intents_client.ts    | 2 ++
 packages/google-cloud-dialogflow-cx/src/v3beta1/pages_client.ts | 2 ++
 .../src/v3beta1/security_settings_service_client.ts             | 2 ++
 .../src/v3beta1/session_entity_types_client.ts                  | 2 ++
 .../google-cloud-dialogflow-cx/src/v3beta1/sessions_client.ts   | 2 ++
 .../google-cloud-dialogflow-cx/src/v3beta1/test_cases_client.ts | 2 ++
 .../src/v3beta1/transition_route_groups_client.ts               | 2 ++
 .../google-cloud-dialogflow-cx/src/v3beta1/versions_client.ts   | 2 ++
 .../google-cloud-dialogflow-cx/src/v3beta1/webhooks_client.ts   | 2 ++
 28 files changed, 56 insertions(+)

diff --git a/packages/google-cloud-dialogflow-cx/src/v3/agents_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/agents_client.ts
index 21ce19de2c8..403481664b2 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/agents_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/agents_client.ts
@@ -142,6 +142,8 @@ export class AgentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/entity_types_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/entity_types_client.ts
index 5c3ec66b99e..fac8753433b 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/entity_types_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/entity_types_client.ts
@@ -140,6 +140,8 @@ export class EntityTypesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/environments_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/environments_client.ts
index 0520138225b..eb95c3e8c7f 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/environments_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/environments_client.ts
@@ -142,6 +142,8 @@ export class EnvironmentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/experiments_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/experiments_client.ts
index c2cdbfbf9f1..f93b7675406 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/experiments_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/experiments_client.ts
@@ -140,6 +140,8 @@ export class ExperimentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/flows_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/flows_client.ts
index 671c9912f41..e5313cbf0db 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/flows_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/flows_client.ts
@@ -142,6 +142,8 @@ export class FlowsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/intents_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/intents_client.ts
index f0f6b6eb96d..380c20050ea 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/intents_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/intents_client.ts
@@ -140,6 +140,8 @@ export class IntentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/pages_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/pages_client.ts
index d84e96fbf45..7b9032f3082 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/pages_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/pages_client.ts
@@ -140,6 +140,8 @@ export class PagesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/security_settings_service_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/security_settings_service_client.ts
index 4cca3fff280..9d525ac78b5 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/security_settings_service_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/security_settings_service_client.ts
@@ -141,6 +141,8 @@ export class SecuritySettingsServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/session_entity_types_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/session_entity_types_client.ts
index e5d4c10803f..5974182df28 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/session_entity_types_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/session_entity_types_client.ts
@@ -140,6 +140,8 @@ export class SessionEntityTypesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/sessions_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/sessions_client.ts
index 1ed8dda040b..197378d0497 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/sessions_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/sessions_client.ts
@@ -133,6 +133,8 @@ export class SessionsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/test_cases_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/test_cases_client.ts
index cac2431cc42..3c8ab51e5a9 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/test_cases_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/test_cases_client.ts
@@ -143,6 +143,8 @@ export class TestCasesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/transition_route_groups_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/transition_route_groups_client.ts
index e3182209949..fc5f04b36b5 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/transition_route_groups_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/transition_route_groups_client.ts
@@ -141,6 +141,8 @@ export class TransitionRouteGroupsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/versions_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/versions_client.ts
index 477a8ed2127..921f861b5ba 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/versions_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/versions_client.ts
@@ -142,6 +142,8 @@ export class VersionsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3/webhooks_client.ts b/packages/google-cloud-dialogflow-cx/src/v3/webhooks_client.ts
index d0cec2c945d..be108898302 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3/webhooks_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3/webhooks_client.ts
@@ -140,6 +140,8 @@ export class WebhooksClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/agents_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/agents_client.ts
index 2f1bc40ab35..db84910c0a7 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/agents_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/agents_client.ts
@@ -142,6 +142,8 @@ export class AgentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/entity_types_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/entity_types_client.ts
index 619b5073db7..10a63dd1ef0 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/entity_types_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/entity_types_client.ts
@@ -140,6 +140,8 @@ export class EntityTypesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/environments_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/environments_client.ts
index a42f73b046b..d1bbee1c5d9 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/environments_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/environments_client.ts
@@ -142,6 +142,8 @@ export class EnvironmentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/experiments_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/experiments_client.ts
index 69b3d16491d..c14469fc6ab 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/experiments_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/experiments_client.ts
@@ -140,6 +140,8 @@ export class ExperimentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/flows_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/flows_client.ts
index ac772e2e470..56452200520 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/flows_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/flows_client.ts
@@ -142,6 +142,8 @@ export class FlowsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/intents_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/intents_client.ts
index e6725f61055..0b7906f71d5 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/intents_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/intents_client.ts
@@ -140,6 +140,8 @@ export class IntentsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/pages_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/pages_client.ts
index 4d2f2b24fe6..b9283b1cb20 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/pages_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/pages_client.ts
@@ -140,6 +140,8 @@ export class PagesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/security_settings_service_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/security_settings_service_client.ts
index 2b18833ece8..f87c431dc7d 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/security_settings_service_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/security_settings_service_client.ts
@@ -141,6 +141,8 @@ export class SecuritySettingsServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/session_entity_types_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/session_entity_types_client.ts
index 93fe6e8a759..d969338d382 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/session_entity_types_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/session_entity_types_client.ts
@@ -140,6 +140,8 @@ export class SessionEntityTypesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/sessions_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/sessions_client.ts
index eda4c927b4b..b70a5b6789a 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/sessions_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/sessions_client.ts
@@ -133,6 +133,8 @@ export class SessionsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/test_cases_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/test_cases_client.ts
index cc0b04c88a7..5e45a718f66 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/test_cases_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/test_cases_client.ts
@@ -143,6 +143,8 @@ export class TestCasesClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/transition_route_groups_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/transition_route_groups_client.ts
index 553fefb38a0..3cc3045c483 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/transition_route_groups_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/transition_route_groups_client.ts
@@ -141,6 +141,8 @@ export class TransitionRouteGroupsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/versions_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/versions_client.ts
index c1c6127e62a..9d2981e56ef 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/versions_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/versions_client.ts
@@ -142,6 +142,8 @@ export class VersionsClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-dialogflow-cx/src/v3beta1/webhooks_client.ts b/packages/google-cloud-dialogflow-cx/src/v3beta1/webhooks_client.ts
index af570a615d9..4348464a4f4 100644
--- a/packages/google-cloud-dialogflow-cx/src/v3beta1/webhooks_client.ts
+++ b/packages/google-cloud-dialogflow-cx/src/v3beta1/webhooks_client.ts
@@ -140,6 +140,8 @@ export class WebhooksClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);