Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-RT-Original-Encoding: us-ascii
Content-Length: 225

One could easily argue that if the desire is to leave a function
unimplemented that the best way to indicate that would be to
surround the function declaration in the header with

   #ifdef KRB5_UNIMPLEMENTED_API
   #endif