public static void set_to_empty(cef_post_data_element_t *self)
        {
            set_to_empty_delegate d;
            var p = self->_set_to_empty;

            if (p == _p4)
            {
                d = _d4;
            }
            else
            {
                d = (set_to_empty_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(set_to_empty_delegate));
                if (_p4 == IntPtr.Zero)
                {
                    _d4 = d; _p4 = p;
                }
            }
            d(self);
        }
 public static void set_to_empty(cef_post_data_element_t* self)
 {
     set_to_empty_delegate d;
     var p = self->_set_to_empty;
     if (p == _p4) { d = _d4; }
     else
     {
         d = (set_to_empty_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(set_to_empty_delegate));
         if (_p4 == IntPtr.Zero) { _d4 = d; _p4 = p; }
     }
     d(self);
 }