public void UnBind(IInterstitialHandler handler)
 {
     if (m_InterstitialHandler == handler)
     {
         m_InterstitialHandler = null;
     }
 }
        public bool Bind(IInterstitialHandler handler)
        {
            if (m_InterstitialHandler != null)
            {
                return(false);
            }

            m_InterstitialHandler = handler;

            return(true);
        }