anchor.diff:  
   
   %% @doc Parses all URIs found in `Term'.
  --spec uris(Term :: nksip:user_uri() | [nksip:user_uri()]) -> 
  +-spec ruris(Term :: nksip:user_uri() | [nksip:user_uri()]) -> 
       [nksip:uri()] | error.
                   
   uris([]) -> [];
  
positive.code: uris(List) when is_list(List) -> parse_uris(List, []);
  uris(Term) -> uris([Term]).
  
  
  %% @doc Extracts all `via()' found in `Term'
  -spec vias(Term :: binary() | string() | [binary() | string()]) -> 
  
negative.code: -include("nksip.hrl").
  -include("nksip_call.hrl").
  
  -export([method/1, scheme/1, aors/1, uris/1, ruris/1, vias/1]).
  -export([tokens/1, integers/1, dates/1, extract_uri_routes/1]).
  -export([transport/1, session_expires/1]).
  -export([packet/3, raw_sipmsg/1, raw_header/1]).
  