@objcMembers
final class User: Object, Socialbase {

    dynamic var name: String = "USER_NAME"
    dynamic var type: String = UserType.none.rawValue

    // Organizable
    let organizations: ReferenceCollection<User> = []
    let peoples: ReferenceCollection<User> = []
    
    // Followable
    let followers: ReferenceCollection<User> = []
    let followees: ReferenceCollection<User> = []
}

extension User {
    typealias Invitation = Test.Invitation
}

class Test {
    @objcMembers
    class Invitation: Object, InvitationProtocol {
        typealias Element = User
        dynamic var status: String = Status.none.rawValue
        dynamic var message: String?
        dynamic var toID: String = ""
        dynamic var fromID: String = ""
    }
}

extension User {
    typealias FollowRequest = Test.FollowRequest
}

extension Test {
    @objcMembers
    class FollowRequest: Object, FollowRequestProtocol {
        typealias Element = User
        dynamic var status: String = Status.none.rawValue
        dynamic var message: String?
        dynamic var toID: String = ""
        dynamic var fromID: String = ""
    }
}

let user0: User = User(id: "user0", value: [:]) // Organization user
let user1: User = User(id: "user1", value: [:])
let invitation: Test.Invitation = Test.Invitation(fromID: user0.id, toID: user1.id)
invitation.save()

let user0: User = User(id: "user0", value: [:])
let user0: User = User(id: "user1", value: [:])
user1.follow(from: user0)