Despawn by custom event

I have found the class and tried to put the script as usual to a gameobejct but the error-message says class can not be abstract... - can you please help me with the code to make a subclass? - I think it must be monobehavior to be placed on a Gameobjet. - So I want to place the subclass on the object which I want to despawn when I FireCustomEvent("DespawnKarten1").


/*! \cond PRIVATE */
using UnityEngine;

// ReSharper disable once CheckNamespace
namespace DarkTonic.CoreGameKit {
// ReSharper disable once CheckNamespace
public interface ICgkEventReceiver {
// this interface is used to "listen" to custom events that Core GameKit transmits.
/// <summary>
/// This checks for events that are not found in Core GameKit. It's a good idea to call this in Start (Awake is too early), and save yourself some troubleshooting time! Optional
/// </summary>
void CheckForIllegalCustomEvents();

/// <summary>
/// This receives the event when it's fired.
/// </summary>
void ReceiveEvent(string customEventName, Vector3 eventOrigin);

/// <summary>
/// This returns a bool of whether the specified custom event is subscribed to in this class
/// </summary>
bool SubscribesToEvent(string customEventName);

/// <summary>
/// Registers the receiver with Core GameKit. Call this in OnEnable
/// </summary>
void RegisterReceiver();

/// <summary>
/// Unregisters the receiver with Core GameKit. Call this in OnDisable
/// </summary>
void UnregisterReceiver();
}
}
/*! \endcond */