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: push.go
    path of file: ./repos/open-im-server/internal/push/offlinepush/jpush
    
    the code of the file until where you have to start completion: // Copyright Â© 2023 OpenIM. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-
    
func (j *JPush) Push(ctx context.Context, userIDs []string, title, content string, opts *offlinepush.Opts) error {
	var pf body.Platform
	pf.SetAll()
	var au body.Audience
	au.SetAlias(userIDs)
	var no body.Notification
	var extras body.Extras
	if opts.Signal.ClientMsgID != "" {
		extras.ClientMsgID = opts.Signal.ClientMsgID
	}
	no.IOSEnableMutableContent()
	no.SetExtras(extras)
	no.SetAlert(title)
	no.SetAndroidIntent(j.config)

	var msg body.Message
	msg.SetMsgContent(content)
	var opt body.Options
	opt.SetApnsProduction(j.config.IOSPush.Production)
	var pushObj body.PushObj
	pushObj.SetPlatform(&pf)
	pushObj.SetAudience(&au)
	pushObj.SetNotification(&no)
	pushObj.SetMessage(&msg)
	pushObj.SetOptions(&opt)
	var resp any
	return j.request(ctx, pushObj, resp, 5)
}