Plugin menu not show in Xcode 9.2

I download ServiceStack Swift Plugin and installed.
but no plugin menu show in Xcode.
xcode version is 9.2 with swift 4.

Apple disabled plugins in XCode 8 so it’s no longer possible to install our extension.

You’ll need to generate Swift DTOs using swift-ref command-line tool.

Thank you.
another problem.
I have a dto like

public abstract class BaseDto
{
    public int Total{get;set;}
}
public class LogOn:BaseDto
{
    ...
}

and changed dto.swift file like this
/

* Options:
Date: 2018-01-10 23:57:20
SwiftVersion: 3.0
Version: 5.00
Tip: To override a DTO option, remove "//" prefix before updating
BaseUrl: ...

BaseClass: NSObject
//AddModelExtensions: True
//AddServiceStackTypes: True
//IncludeTypes: 
//ExcludeTypes: 
//ExcludeGenericBaseTypes: False
//AddResponseStatus: False
//AddImplicitVersion: 
//AddDescriptionAsComments: True
//InitializeCollections: True
//TreatTypesAsStrings: 
//DefaultImports: Foundation
*/

then class LogOn like this

public class LogOn : BaseDto
{
    required public init(){}
    public var loginId:String?
    public var loginPwd:String?
}
extension LogOn : JsonSerializable
{
    public static var typeName:String { return "LogOn" }
    public static var metadata = Metadata.create([
            Type<LogOn>.optionalProperty("loginId", get: { $0.loginId }, set: { $0.loginId = $1 }),
            Type<LogOn>.optionalProperty("loginPwd", get: { $0.loginPwd }, set: { $0.loginPwd = $1 }),
            Type<LogOn>.optionalProperty("schoolId", get: { $0.schoolId }, set: { $0.schoolId = $1 }),
            Type<LogOn>.optionalProperty("skip", get: { $0.skip }, set: { $0.skip = $1 }),
            Type<LogOn>.optionalProperty("take", get: { $0.take }, set: { $0.take = $1 }),
        ])
}

when I use client.post(LogOn()) error happens

I need make some change on class LogOn

public class LogOn : NSObject,IReturn
{
    required public override init(){}
    public typealias Return = ClassResponse
    public var loginId:String?
    public var loginPwd:String?
}

should I need write dtos only for ios? or something I can do with settings?

You need to annotate your Request DTOs with the IReturn<T> marker, e.g:

public class LogOn : IReturn<ClassResponse>
{
    ...
}