public static void add_event_listener(cef_domnode_t *self, cef_string_t *eventType, cef_domevent_listener_t *listener, int useCapture)
        {
            add_event_listener_delegate d;
            var p = self->_add_event_listener;

            if (p == _p15)
            {
                d = _d15;
            }
            else
            {
                d = (add_event_listener_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(add_event_listener_delegate));
                if (_p15 == IntPtr.Zero)
                {
                    _d15 = d; _p15 = p;
                }
            }
            d(self, eventType, listener, useCapture);
        }
 public static void add_event_listener(cef_domnode_t* self, cef_string_t* eventType, cef_domevent_listener_t* listener, int useCapture)
 {
     add_event_listener_delegate d;
     var p = self->_add_event_listener;
     if (p == _p15) { d = _d15; }
     else
     {
         d = (add_event_listener_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(add_event_listener_delegate));
         if (_p15 == IntPtr.Zero) { _d15 = d; _p15 = p; }
     }
     d(self, eventType, listener, useCapture);
 }