/// <summary>
        /// Calls the parent object's implementation of <see cref="CpMediaContainer.CheckRuntimeBindings"/>.
        /// </summary>
        /// <param name="st">stack trace object, created in the method that desires runtime checking</param>
        public override void CheckRuntimeBindings(StackTrace st)
        {
            if (this.Parent != null)
            {
                CpMediaContainer parent = (CpMediaContainer)this.Parent;

                parent.CheckRuntimeBindings(st);
            }
        }