http/2 TRACE method

Hi,

I tried to find the answer for this question via Google but was not 
lucky. I've also checked the http/2 RFC but but found no answer as well.

Wondering if you know what the behavior of the HTTP TRACE method should 
be with http/2. Should it just echo back the headers/response as 
decoded, as binary?

It is not clear what a server response should be in this case or if it 
is even supported.

Francisco