diff --git a/google/cloud/billing/v1/cloud_billing.proto b/google/cloud/billing/v1/cloud_billing.proto
index b98f0fd7c2..4f6277b3f2 100644
--- a/google/cloud/billing/v1/cloud_billing.proto
+++ b/google/cloud/billing/v1/cloud_billing.proto
@@ -51,7 +51,8 @@ service CloudBilling {
   // Lists the billing accounts that the current authenticated user has
   // permission to
   // [view](https://cloud.google.com/billing/docs/how-to/billing-access).
-  rpc ListBillingAccounts(ListBillingAccountsRequest) returns (ListBillingAccountsResponse) {
+  rpc ListBillingAccounts(ListBillingAccountsRequest)
+      returns (ListBillingAccountsResponse) {
     option (google.api.http) = {
       get: "/v1/billingAccounts"
     };
@@ -64,7 +65,8 @@ service CloudBilling {
   // IAM permission, which is typically given to the
   // [administrator](https://cloud.google.com/billing/docs/how-to/billing-access)
   // of the billing account.
-  rpc UpdateBillingAccount(UpdateBillingAccountRequest) returns (BillingAccount) {
+  rpc UpdateBillingAccount(UpdateBillingAccountRequest)
+      returns (BillingAccount) {
     option (google.api.http) = {
       patch: "/v1/{name=billingAccounts/*}"
       body: "account"
@@ -87,7 +89,8 @@ service CloudBilling {
   // [administrators](https://cloud.google.com/billing/docs/how-to/billing-access).
   // This method will return an error if the parent account has not been
   // provisioned as a reseller account.
-  rpc CreateBillingAccount(CreateBillingAccountRequest) returns (BillingAccount) {
+  rpc CreateBillingAccount(CreateBillingAccountRequest)
+      returns (BillingAccount) {
     option (google.api.http) = {
       post: "/v1/billingAccounts"
       body: "billing_account"
@@ -99,7 +102,8 @@ service CloudBilling {
   // authenticated user must have the `billing.resourceAssociations.list` IAM
   // permission, which is often given to billing account
   // [viewers](https://cloud.google.com/billing/docs/how-to/billing-access).
-  rpc ListProjectBillingInfo(ListProjectBillingInfoRequest) returns (ListProjectBillingInfoResponse) {
+  rpc ListProjectBillingInfo(ListProjectBillingInfoRequest)
+      returns (ListProjectBillingInfoResponse) {
     option (google.api.http) = {
       get: "/v1/{name=billingAccounts/*}/projects"
     };
@@ -111,7 +115,8 @@ service CloudBilling {
   // which can be granted by assigning the [Project
   // Viewer](https://cloud.google.com/iam/docs/understanding-roles#predefined_roles)
   // role.
-  rpc GetProjectBillingInfo(GetProjectBillingInfoRequest) returns (ProjectBillingInfo) {
+  rpc GetProjectBillingInfo(GetProjectBillingInfoRequest)
+      returns (ProjectBillingInfo) {
     option (google.api.http) = {
       get: "/v1/{name=projects/*}/billingInfo"
     };
@@ -149,7 +154,8 @@ service CloudBilling {
   // resources used by the project will be shut down. Thus, unless you wish to
   // disable billing, you should always call this method with the name of an
   // *open* billing account.
-  rpc UpdateProjectBillingInfo(UpdateProjectBillingInfoRequest) returns (ProjectBillingInfo) {
+  rpc UpdateProjectBillingInfo(UpdateProjectBillingInfoRequest)
+      returns (ProjectBillingInfo) {
     option (google.api.http) = {
       put: "/v1/{name=projects/*}/billingInfo"
       body: "project_billing_info"
@@ -161,7 +167,8 @@ service CloudBilling {
   // The caller must have the `billing.accounts.getIamPolicy` permission on the
   // account, which is often given to billing account
   // [viewers](https://cloud.google.com/billing/docs/how-to/billing-access).
-  rpc GetIamPolicy(google.iam.v1.GetIamPolicyRequest) returns (google.iam.v1.Policy) {
+  rpc GetIamPolicy(google.iam.v1.GetIamPolicyRequest)
+      returns (google.iam.v1.Policy) {
     option (google.api.http) = {
       get: "/v1/{resource=billingAccounts/*}:getIamPolicy"
     };
@@ -173,7 +180,8 @@ service CloudBilling {
   // The caller must have the `billing.accounts.setIamPolicy` permission on the
   // account, which is often given to billing account
   // [administrators](https://cloud.google.com/billing/docs/how-to/billing-access).
-  rpc SetIamPolicy(google.iam.v1.SetIamPolicyRequest) returns (google.iam.v1.Policy) {
+  rpc SetIamPolicy(google.iam.v1.SetIamPolicyRequest)
+      returns (google.iam.v1.Policy) {
     option (google.api.http) = {
       post: "/v1/{resource=billingAccounts/*}:setIamPolicy"
       body: "*"
@@ -184,7 +192,8 @@ service CloudBilling {
   // Tests the access control policy for a billing account. This method takes
   // the resource and a set of permissions as input and returns the subset of
   // the input permissions that the caller is allowed for that resource.
-  rpc TestIamPermissions(google.iam.v1.TestIamPermissionsRequest) returns (google.iam.v1.TestIamPermissionsResponse) {
+  rpc TestIamPermissions(google.iam.v1.TestIamPermissionsRequest)
+      returns (google.iam.v1.TestIamPermissionsResponse) {
     option (google.api.http) = {
       post: "/v1/{resource=billingAccounts/*}:testIamPermissions"
       body: "*"
@@ -197,8 +206,8 @@ service CloudBilling {
 // [Google Cloud Console](https://console.cloud.google.com/). You can assign a
 // billing account to one or more projects.
 message BillingAccount {
-  // Output only. The resource name of the billing account. The resource name has the form
-  // `billingAccounts/{billing_account_id}`. For example,
+  // Output only. The resource name of the billing account. The resource name
+  // has the form `billingAccounts/{billing_account_id}`. For example,
   // `billingAccounts/012345-567890-ABCDEF` would be the resource name for
   // billing account `012345-567890-ABCDEF`.
   string name = 1 [
@@ -208,9 +217,10 @@ message BillingAccount {
     }
   ];
 
-  // Output only. True if the billing account is open, and will therefore be charged for any
-  // usage on associated projects. False if the billing account is closed, and
-  // therefore projects associated with it will be unable to use paid services.
+  // Output only. True if the billing account is open, and will therefore be
+  // charged for any usage on associated projects. False if the billing account
+  // is closed, and therefore projects associated with it will be unable to use
+  // paid services.
   bool open = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
 
   // The display name given to the billing account, such as `My Billing
@@ -253,8 +263,8 @@ message ProjectBillingInfo {
 
 // Request message for `GetBillingAccount`.
 message GetBillingAccountRequest {
-  // Required. The resource name of the billing account to retrieve. For example,
-  // `billingAccounts/012345-567890-ABCDEF`.
+  // Required. The resource name of the billing account to retrieve. For
+  // example, `billingAccounts/012345-567890-ABCDEF`.
   string name = 1 [
     (google.api.field_behavior) = REQUIRED,
     (google.api.resource_reference) = {
@@ -313,7 +323,8 @@ message UpdateBillingAccountRequest {
     }
   ];
 
-  // Required. The billing account resource to replace the resource on the server.
+  // Required. The billing account resource to replace the resource on the
+  // server.
   BillingAccount account = 2 [(google.api.field_behavior) = REQUIRED];
 
   // The update mask applied to the resource.
@@ -323,8 +334,9 @@ message UpdateBillingAccountRequest {
 
 // Request message for `ListProjectBillingInfo`.
 message ListProjectBillingInfoRequest {
-  // Required. The resource name of the billing account associated with the projects that
-  // you want to list. For example, `billingAccounts/012345-567890-ABCDEF`.
+  // Required. The resource name of the billing account associated with the
+  // projects that you want to list. For example,
+  // `billingAccounts/012345-567890-ABCDEF`.
   string name = 1 [
     (google.api.field_behavior) = REQUIRED,
     (google.api.resource_reference) = {
@@ -363,8 +375,9 @@ message GetProjectBillingInfoRequest {
 
 // Request message for `UpdateProjectBillingInfo`.
 message UpdateProjectBillingInfoRequest {
-  // Required. The resource name of the project associated with the billing information
-  // that you want to update. For example, `projects/tokyo-rain-123`.
+  // Required. The resource name of the project associated with the billing
+  // information that you want to update. For example,
+  // `projects/tokyo-rain-123`.
   string name = 1 [(google.api.field_behavior) = REQUIRED];
 
   // The new billing information for the project. Read-only fields are ignored;