fix: [Many APIs] simplify logic for HTTP/1.1 REST fallback option (#4583

) * fix: simplify logic for HTTP/1.1 REST fallback option For the `fallback` parameter, all values considered as `true` in Boolean context will enable HTTP/1.1 REST fallback, since the other fallback transport, proto over HTTP, is removed from `google-gax` v4. PiperOrigin-RevId: 559812260 Source-Link: googleapis/googleapis@6a6fd29 Source-Link: googleapis/googleapis-gen@56c1665 Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFpLWdlbmVyYXRpdmVsYW5ndWFnZS8uT3dsQm90LnlhbWwiLCJoIjoiNTZjMTY2NTdlN2E1OTEyMmIxZGE5NDc3MWE5ZWY0MDk4OWMyODJjMCJ9 Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFuYWx5dGljcy1hZG1pbi8uT3dsQm90LnlhbWwiLCJoIjoiNTZjMTY2NTdlN2E1OTEyMmIxZGE5NDc3MWE5ZWY0MDk4OWMyODJjMCJ9 Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFuYWx5dGljcy1kYXRhLy5Pd2xCb3QueWFtbCIsImgiOiI1NmMxNjY1N2U3YTU5MTIyYjFkYTk0NzcxYTllZjQwOTg5YzI4MmMwIn0= Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFwaS1hcGlrZXlzLy5Pd2xCb3QueWFtbCIsImgiOiI1NmMxNjY1N2U3YTU5MTIyYjFkYTk0NzcxYTllZjQwOTg5YzI4MmMwIn0= Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFwaS1zZXJ2aWNlY29udHJvbC8uT3dsQm90LnlhbWwiLCJoIjoiNTZjMTY2NTdlN2E1OTEyMmIxZGE5NDc3MWE5ZWY0MDk4OWMyODJjMCJ9 Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFwaS1zZXJ2aWNlbWFuYWdlbWVudC8uT3dsQm90LnlhbWwiLCJoIjoiNTZjMTY2NTdlN2E1OTEyMmIxZGE5NDc3MWE5ZWY0MDk4OWMyODJjMCJ9 Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFwaS1zZXJ2aWNldXNhZ2UvLk93bEJvdC55YW1sIiwiaCI6IjU2YzE2NjU3ZTdhNTkxMjJiMWRhOTQ3NzFhOWVmNDA5ODljMjgyYzAifQ== Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFwcGVuZ2luZS8uT3dsQm90LnlhbWwiLCJoIjoiNTZjMTY2NTdlN2E1OTEyMmIxZGE5NDc3MWE5ZWY0MDk4OWMyODJjMCJ9 Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWFyZWExMjAtdGFibGVzLy5Pd2xCb3QueWFtbCIsImgiOiI1NmMxNjY1N2U3YTU5MTIyYjFkYTk0NzcxYTllZjQwOTg5YzI4MmMwIn0= Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFjY2Vzc2FwcHJvdmFsLy5Pd2xCb3QueWFtbCIsImgiOiI1NmMxNjY1N2U3YTU5MTIyYjFkYTk0NzcxYTllZjQwOTg5YzI4MmMwIn0= Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFkdmlzb3J5bm90aWZpY2F0aW9ucy8uT3dsQm90LnlhbWwiLCJoIjoiNTZjMTY2NTdlN2E1OTEyMmIxZGE5NDc3MWE5ZWY0MDk4OWMyODJjMCJ9 Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFpcGxhdGZvcm0vLk93bEJvdC55YW1sIiwiaCI6IjU2YzE2NjU3ZTdhNTkxMjJiMWRhOTQ3NzFhOWVmNDA5ODljMjgyYzAifQ== Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFsbG95ZGIvLk93bEJvdC55YW1sIiwiaCI6IjU2YzE2NjU3ZTdhNTkxMjJiMWRhOTQ3NzFhOWVmNDA5ODljMjgyYzAifQ== Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFwaWdhdGV3YXkvLk93bEJvdC55YW1sIiwiaCI6IjU2YzE2NjU3ZTdhNTkxMjJiMWRhOTQ3NzFhOWVmNDA5ODljMjgyYzAifQ== Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFwaWdlZWNvbm5lY3QvLk93bEJvdC55YW1sIiwiaCI6IjU2YzE2NjU3ZTdhNTkxMjJiMWRhOTQ3NzFhOWVmNDA5ODljMjgyYzAifQ== Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFzc2V0Ly5Pd2xCb3QueWFtbCIsImgiOiI1NmMxNjY1N2U3YTU5MTIyYjFkYTk0NzcxYTllZjQwOTg5YzI4MmMwIn0= Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWFzc3VyZWR3b3JrbG9hZHMvLk93bEJvdC55YW1sIiwiaCI6IjU2YzE2NjU3ZTdhNTkxMjJiMWRhOTQ3NzFhOWVmNDA5ODljMjgyYzAifQ== Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWJhcmVtZXRhbHNvbHV0aW9uLy5Pd2xCb3QueWFtbCIsImgiOiI1NmMxNjY1N2U3YTU5MTIyYjFkYTk0NzcxYTllZjQwOTg5YzI4MmMwIn0= Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWJhdGNoLy5Pd2xCb3QueWFtbCIsImgiOiI1NmMxNjY1N2U3YTU5MTIyYjFkYTk0NzcxYTllZjQwOTg5YzI4MmMwIn0= Copy-Tag: eyJwIjoicGFja2FnZXMvZ29vZ2xlLWNsb3VkLWJleW9uZGNvcnAtYXBwY29ubmVjdGlvbnMvLk93bEJvdC55YW1sIiwiaCI6IjU2YzE2NjU3ZTdhNTkxMjJiMWRhOTQ3NzFhOWVmNDA5ODljMjgyYzAifQ== * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md --------- Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
googleapis · Aug 25, 2023 · c3ddba8 · c3ddba8
1 parent 13537fc
commit c3ddba8
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diff --git a/packages/google-ai-generativelanguage/src/v1beta2/discuss_service_client.ts b/packages/google-ai-generativelanguage/src/v1beta2/discuss_service_client.ts
@@ -91,16 +91,15 @@ export class DiscussServiceClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new DiscussServiceClient({fallback: 'rest'}, gax);
+   *     const client = new DiscussServiceClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -166,7 +165,7 @@ export class DiscussServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-ai-generativelanguage/src/v1beta2/model_service_client.ts b/packages/google-ai-generativelanguage/src/v1beta2/model_service_client.ts
@@ -90,16 +90,15 @@ export class ModelServiceClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new ModelServiceClient({fallback: 'rest'}, gax);
+   *     const client = new ModelServiceClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -165,7 +164,7 @@ export class ModelServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-ai-generativelanguage/src/v1beta2/text_service_client.ts b/packages/google-ai-generativelanguage/src/v1beta2/text_service_client.ts
@@ -91,16 +91,15 @@ export class TextServiceClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new TextServiceClient({fallback: 'rest'}, gax);
+   *     const client = new TextServiceClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -166,7 +165,7 @@ export class TextServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-analytics-admin/src/v1alpha/analytics_admin_service_client.ts b/packages/google-analytics-admin/src/v1alpha/analytics_admin_service_client.ts
@@ -90,16 +90,15 @@ export class AnalyticsAdminServiceClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new AnalyticsAdminServiceClient({fallback: 'rest'}, gax);
+   *     const client = new AnalyticsAdminServiceClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -166,7 +165,7 @@ export class AnalyticsAdminServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-analytics-admin/src/v1beta/analytics_admin_service_client.ts b/packages/google-analytics-admin/src/v1beta/analytics_admin_service_client.ts
@@ -90,16 +90,15 @@ export class AnalyticsAdminServiceClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new AnalyticsAdminServiceClient({fallback: 'rest'}, gax);
+   *     const client = new AnalyticsAdminServiceClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -166,7 +165,7 @@ export class AnalyticsAdminServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-analytics-data/src/v1alpha/alpha_analytics_data_client.ts b/packages/google-analytics-data/src/v1alpha/alpha_analytics_data_client.ts
@@ -93,16 +93,15 @@ export class AlphaAnalyticsDataClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new AlphaAnalyticsDataClient({fallback: 'rest'}, gax);
+   *     const client = new AlphaAnalyticsDataClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -168,7 +167,7 @@ export class AlphaAnalyticsDataClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
@@ -208,7 +207,7 @@ export class AlphaAnalyticsDataClient {
       auth: this.auth,
       grpc: 'grpc' in this._gaxGrpc ? this._gaxGrpc.grpc : undefined,
     };
-    if (opts.fallback === 'rest') {
+    if (opts.fallback) {
       lroOptions.protoJson = protoFilesRoot;
       lroOptions.httpRules = [];
     }

diff --git a/packages/google-analytics-data/src/v1beta/beta_analytics_data_client.ts b/packages/google-analytics-data/src/v1beta/beta_analytics_data_client.ts
@@ -88,16 +88,15 @@ export class BetaAnalyticsDataClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new BetaAnalyticsDataClient({fallback: 'rest'}, gax);
+   *     const client = new BetaAnalyticsDataClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -163,7 +162,7 @@ export class BetaAnalyticsDataClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-api-apikeys/src/v2/api_keys_client.ts b/packages/google-api-apikeys/src/v2/api_keys_client.ts
@@ -93,16 +93,15 @@ export class ApiKeysClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new ApiKeysClient({fallback: 'rest'}, gax);
+   *     const client = new ApiKeysClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -168,7 +167,7 @@ export class ApiKeysClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
@@ -211,7 +210,7 @@ export class ApiKeysClient {
       auth: this.auth,
       grpc: 'grpc' in this._gaxGrpc ? this._gaxGrpc.grpc : undefined,
     };
-    if (opts.fallback === 'rest') {
+    if (opts.fallback) {
       lroOptions.protoJson = protoFilesRoot;
       lroOptions.httpRules = [
         {

diff --git a/packages/google-api-servicecontrol/src/v1/quota_controller_client.ts b/packages/google-api-servicecontrol/src/v1/quota_controller_client.ts
@@ -90,16 +90,15 @@ export class QuotaControllerClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new QuotaControllerClient({fallback: 'rest'}, gax);
+   *     const client = new QuotaControllerClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -165,7 +164,7 @@ export class QuotaControllerClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-api-servicecontrol/src/v1/service_controller_client.ts b/packages/google-api-servicecontrol/src/v1/service_controller_client.ts
@@ -90,16 +90,15 @@ export class ServiceControllerClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new ServiceControllerClient({fallback: 'rest'}, gax);
+   *     const client = new ServiceControllerClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -165,7 +164,7 @@ export class ServiceControllerClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-api-servicecontrol/src/v2/service_controller_client.ts b/packages/google-api-servicecontrol/src/v2/service_controller_client.ts
@@ -94,16 +94,15 @@ export class ServiceControllerClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new ServiceControllerClient({fallback: 'rest'}, gax);
+   *     const client = new ServiceControllerClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -169,7 +168,7 @@ export class ServiceControllerClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {

diff --git a/packages/google-api-servicemanagement/src/v1/service_manager_client.ts b/packages/google-api-servicemanagement/src/v1/service_manager_client.ts
@@ -96,16 +96,15 @@ export class ServiceManagerClient {
    *     API remote host.
    * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
    *     Follows the structure of {@link gapicConfig}.
-   * @param {boolean | "rest"} [options.fallback] - Use HTTP fallback mode.
-   *     Pass "rest" to use HTTP/1.1 REST API instead of gRPC.
+   * @param {boolean} [options.fallback] - Use HTTP/1.1 REST mode.
    *     For more information, please check the
    *     {@link https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md#http11-rest-api-mode documentation}.
    * @param {gax} [gaxInstance]: loaded instance of `google-gax`. Useful if you
    *     need to avoid loading the default gRPC version and want to use the fallback
    *     HTTP implementation. Load only fallback version and pass it to the constructor:
    *     ```
    *     const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC
-   *     const client = new ServiceManagerClient({fallback: 'rest'}, gax);
+   *     const client = new ServiceManagerClient({fallback: true}, gax);
    *     ```
    */
   constructor(
@@ -172,7 +171,7 @@ export class ServiceManagerClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
-    } else if (opts.fallback === 'rest') {
+    } else {
       clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
@@ -210,7 +209,7 @@ export class ServiceManagerClient {
       auth: this.auth,
       grpc: 'grpc' in this._gaxGrpc ? this._gaxGrpc.grpc : undefined,
     };
-    if (opts.fallback === 'rest') {
+    if (opts.fallback) {
       lroOptions.protoJson = protoFilesRoot;
       lroOptions.httpRules = [
         {