public static void set_copies(cef_print_settings_t *self, int copies)
        {
            set_copies_delegate d;
            var p = self->_set_copies;

            if (p == _p16)
            {
                d = _d16;
            }
            else
            {
                d = (set_copies_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(set_copies_delegate));
                if (_p16 == IntPtr.Zero)
                {
                    _d16 = d; _p16 = p;
                }
            }
            d(self, copies);
        }
 public static void set_copies(cef_print_settings_t* self, int copies)
 {
     set_copies_delegate d;
     var p = self->_set_copies;
     if (p == _p16) { d = _d16; }
     else
     {
         d = (set_copies_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(set_copies_delegate));
         if (_p16 == IntPtr.Zero) { _d16 = d; _p16 = p; }
     }
     d(self, copies);
 }