     }
 
     public static func previousVersion() -> String? {
-     return sharedInstance.previousVersion()
+        return sharedInstance.previousVersion()
     }
     
     public static func versionHistory() -> [String] {

    public static func isFirstLaunchEver() -> Bool {
        return sharedInstance.firstLaunchEver
    }


    public static func isFirstLaunchForVersion(version: String = "", firstLaunch: Firstlaunch? = nil) -> Bool {
        var isFirstVersion = sharedInstance.firstLaunchForVersion
        if version != "" {
            isFirstVersion = sharedInstance.historyContainsVersion(version)

        }
        return isFirstBuild
    }
    
    // MARK: - Version
    
    public static func currentVersion() -> String {
