/// <summary>
/// Attaches follower to genrate event.
/// </summary>
/// <param name="follower"></param>
public static void AttachOnGenerate(this ComponentGenerator source, ComponentGenerator follower)
{
//avoid recursion
follower.DetachOnGenerate(source);
//avoid duplicate
DetachOnGenerate(source, follower);
source.OnGenerateEventHandler += (e, a) => follower.Generate();
}
