You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: expressroutegateways_client.go
    path of file: ./repos/azure-sdk-for-go/sdk/resourcemanager/network/armnetwork
    
    the code of the file until where you have to start completion: //go:build go1.18
// +build go1.18

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
// Code generated by Microsoft (R) AutoRest Code Generator. DO NOT EDIT.
// Changes may cause incorrect behavior and will be lost if the code is regenerated.

package armnetwork

import (
	"context"
	"errors"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore/arm"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore/runtime"
	"net/http"
	"net/url"
	"strings"
)

// ExpressRouteGatewaysClient contains the methods for the ExpressRouteGateways group.
// Don't use this type directly, use NewExpressRouteGatewaysClient() instead.
type ExpressRouteGatewaysClient struct {
	internal       *arm.Client
	subscriptionID string
}

// NewExpressRouteGatewaysClient creates a new instance of ExpressRouteGatewaysClient with the specified values.
//   - subscriptionID - The subscription credentials which uniquely identify the Microsoft Azure subscription. The subscription
//     ID forms part of the URI for every service call.
//   - credential - used to authorize requests. Usually a credential from azidentity.
//   - options - pass nil to accept t
    
func (client *ExpressRouteGatewaysClient) updateTagsCreateRequest(ctx context.Context, resourceGroupName string, expressRouteGatewayName string, expressRouteGatewayParameters TagsObject, options *ExpressRouteGatewaysClientBeginUpdateTagsOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/expressRouteGateways/{expressRouteGatewayName}"
	if client.subscriptionID == "" {
		return nil, errors.New("parameter client.subscriptionID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{subscriptionId}", url.PathEscape(client.subscriptionID))
	if resourceGroupName == "" {
		return nil, errors.New("parameter resourceGroupName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{resourceGroupName}", url.PathEscape(resourceGroupName))
	if expressRouteGatewayName == "" {
		return nil, errors.New("parameter expressRouteGatewayName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{expressRouteGatewayName}", url.PathEscape(expressRouteGatewayName))
	req, err := runtime.NewRequest(ctx, http.MethodPatch, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	reqQP.Set("api-version", "2023-09-01")
	req.Raw().URL.RawQuery = reqQP.Encode()
	req.Raw().Header["Accept"] = []string{"application/json"}
	if err := runtime.MarshalAsJSON(req, expressRouteGatewayParameters); err != nil {
		return nil, err
	}
	return req, nil
}