     func status() -> String {
         guard let latestTrackHistory = self.package.value.latestTrackHistory() else { return "No information available yet" }
         return latestTrackHistory.status
-    }
-    
-    func lastUpdateDateString() -> String {
-        guard let latestTrackHistory = self.package.value.latestTrackHistory() else { return "" }
-        return latestTrackHistory.date.timeAgoSimple()
     }
     
     func trackingNumber() -> String {

    }
    
    func lastUpdateDateString() -> String {
        return self.packageTrackHistory.date.timeAgo()
    }
}

import Foundation
import RxSwift

protocol PackageViewModelType {
    func status() -> String
}

struct PackageViewModel: PackageViewModelType {
