         animated: Bool = true,
         completion: @escaping ((ALRT.Result) -> Void) = { _ in }
     ) {
-        guard let alert = self.alertController else {
+        guard let alert = alertController else {
             completion(.failure(.alertControllerNil))
             return
         }

        case sourceViewControllerNil
    }

    var alertController: UIAlertController?

    private init() {}


/// Responsible for creating and managing an ALRT object.

public class ALRT {
    /**
     Configuration struct to define default tintColor for buttons, ok button title and cancel button title.
     Use `defaultConfiguration`
     */
    public struct Configuration {
        public var tintColor: UIColor?
        public var okTitle: String?
        public var cancelTitle: String?
    }

    /**
     Result indicating whether the alert is displayed or not.

