anchor.diff:      , user           = User
       , host           = Host
       , port           = Port
  -    , path_and_query = PathAndQuery
  -    , query          = _Query
  +    , path           = Path
  +    , query          = Query
       }
   ) ->
       UserOrEmpty =
  
positive.code:     , user           = User
      , host           = Host
      , port           = Port
      , path_and_query = PathAndQuery
      , path           = Path
      , query          = Query
      }.
  
  -spec get_path_and_query(t()) ->
      binary().
  get_path_and_query(#t{path_and_query=PathAndQuery}) ->
      PathAndQuery.
  
  -spec get_query(t()) ->
      query().
  get_query(#t{query=Query}) ->
      Query.
  
  -spec to_bin(t()) ->
      binary().
  
negative.code: 
  -export(
      [ cons/1
      , get_query/1
      , set_query/2
      , to_bin/1
      , of_bin/1
      ]).
  