anchor.diff:      {call, Line,
        {remote, Line,
         logger_impl_expr(LoggerExpr), {atom, Line, Fn}}, []};
  -transform({call, Line, {remote, _Line1,
  -                        {atom, _Line2, ale},
  -                        {atom, _Line3, Fn}},
  +transform({call, Line, {remote, _,
  +                        {atom, _, ale},
  +                        {atom, _, Fn}},
              [LoggerExpr, LogLevelExpr]} = Stmt)
     when Fn =:= is_loglevel_enabled ->
       case valid_loglevel_expr(LogLevelExpr) of
  
positive.code:         false ->
              Stmt
      end;
  transform({call, Line, {remote, Line1,
                          {atom, Line2, ale},
                          {atom, Line3, LogFn}},
             [LoggerExpr, LogLevelExpr | Args]} = Stmt)
    when LogFn =:= log; LogFn =:= xlog ->
      Extended = LogFn =:= xlog,
  
negative.code: walk_body(Acc, [H|T]) ->
      walk_body([transform(H) | Acc], T).
  
  transform({call, Line, {remote, _,
                          {atom, _, ale},
                          {atom, _, Fn}},
             [LoggerExpr]})
    when Fn =:= sync;
         Fn =:= get_effective_loglevel ->
  