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: custom_client.go
    path of file: ./repos/azure-sdk-for-go/sdk/ai/azopenai
    
    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.

// Package azopenai Azure OpenAI Service provides access to OpenAI's powerful language models including the GPT-4,
//
    
func NewChatRequestUserMessageContent[T string | []ChatCompletionRequestMessageContentPartClassification](v T) ChatRequestUserMessageContent {
	switch actualV := any(v).(type) {
	case string:
		return ChatRequestUserMessageContent{value: &actualV}
	case []ChatCompletionRequestMessageContentPartClassification:
		return ChatRequestUserMessageContent{value: actualV}
	}
	return ChatRequestUserMessageContent{}
}