anchor.diff:  
   '*default-data-reader-fn*__val'() ->
     var_value(<<"#'clojure.core/*default-data-reader-fn*">>, ?NIL).
  +
  +'*reader-resolver*__val'() ->
  +  var_value(<<"#'clojure.core/*reader-resolver*">>, ?NIL).
   
   '*warn-on-infer*__val'() ->
     var_value(<<"#'clojure.core/*warn-on-infer*">>, false).
  
positive.code:                 , val_atom  => '*default-data-reader-fn*__val'
                  , meta      => #{dynamic => true}
                  }
             , <<"*warn-on-infer*">> =>
                 #{ ?TYPE     => 'clojerl.Var'
                  , ns        => <<"clojure.core">>
  
negative.code:         , '*data-readers*__val'/0
          , 'default-data-readers__val'/0
          , '*default-data-reader-fn*__val'/0
          , '*reader-resolver*__val'/0
  
          , '*warn-on-infer*__val'/0
          ]).
  