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: channels_client.go
    path of file: ./repos/azure-sdk-for-go/sdk/resourcemanager/eventgrid/armeventgrid
    
    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 armeventgrid

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"
	"strconv"
	"strings"
)

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

// NewChannelsClient creates a new instance of ChannelsClient with the specified values.
//   - subscriptionID - Subscription credentials that uniquely identify a 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.
//   - opti
    
func (client *ChannelsClient) listByPartnerNamespaceCreateRequest(ctx context.Context, resourceGroupName string, partnerNamespaceName string, options *ChannelsClientListByPartnerNamespaceOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/partnerNamespaces/{partnerNamespaceName}/channels"
	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 partnerNamespaceName == "" {
		return nil, errors.New("parameter partnerNamespaceName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{partnerNamespaceName}", url.PathEscape(partnerNamespaceName))
	req, err := runtime.NewRequest(ctx, http.MethodGet, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	reqQP.Set("api-version", "2023-12-15-preview")
	if options != nil && options.Filter != nil {
		reqQP.Set("$filter", *options.Filter)
	}
	if options != nil && options.Top != nil {
		reqQP.Set("$top", strconv.FormatInt(int64(*options.Top), 10))
	}
	req.Raw().URL.RawQuery = reqQP.Encode()
	req.Raw().Header["Accept"] = []string{"application/json"}
	return req, nil
}